diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index 2d4350f2..15cda80c 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -75585,20 +75585,20 @@
 0x0000007100db3ffc,evt::Event::doAssign,296,
 0x0000007100db4124,evt::Event::assign,48,
 0x0000007100db4154,sub_7100DB4154,1680,
-0x0000007100db47e4,ksys::evt::OrderParam::ctor,36,
-0x0000007100db4808,sub_7100DB4808,20,
-0x0000007100db481c,sub_7100DB481C,284,
-0x0000007100db4938,sub_7100DB4938,52,
-0x0000007100db496c,ksys::evt::OrderParam::doAssign,1160,
-0x0000007100db4df4,ksys::evt::OrderParam::assign,48,
-0x0000007100db4e24,ksys::evt::OrderParam::initialize,332,
-0x0000007100db4f70,ksys::evt::OrderParam::addParamInt,220,
-0x0000007100db504c,ksys::evt::OrderParam::addParamStr,412,
-0x0000007100db51e8,ksys::evt::OrderParam::tryAlloc_,944,
-0x0000007100db5598,ksys::evt::OrderParam::addParamActor,240,
-0x0000007100db5688,ksys::evt::OrderParam::addInt,176,
-0x0000007100db5738,ksys::evt::OrderParam::getParameter,176,
-0x0000007100db57e8,ksys::evt::OrderParam::x_1,208,
+0x0000007100db47e4,ksys::evt::OrderParam::ctor,36,_ZN4ksys3evt10OrderParamC1EPN4sead4HeapE
+0x0000007100db4808,ksys::evt::OrderParam::dtor,20,_ZN4ksys3evt10OrderParamD1Ev
+0x0000007100db481c,ksys::evt::OrderParam::uninitialize,284,_ZN4ksys3evt10OrderParam12uninitializeEv
+0x0000007100db4938,ksys::evt::OrderParam::dtorDelete,52,_ZN4ksys3evt10OrderParamD0Ev
+0x0000007100db496c,ksys::evt::OrderParam::doAssign,1160,_ZN4ksys3evt10OrderParam8doAssignERKS1_
+0x0000007100db4df4,ksys::evt::OrderParam::assign,48,_ZN4ksys3evt10OrderParamaSERKS1_
+0x0000007100db4e24,ksys::evt::OrderParam::initialize,332,_ZN4ksys3evt10OrderParam10initializeEi
+0x0000007100db4f70,ksys::evt::OrderParam::addParamInt,220,_ZN4ksys3evt10OrderParam11addParamIntEiRKN4sead14SafeStringBaseIcEE
+0x0000007100db504c,ksys::evt::OrderParam::addParamString,412,_ZN4ksys3evt10OrderParam14addParamStringERKN4sead14SafeStringBaseIcEES6_
+0x0000007100db51e8,ksys::evt::OrderParam::tryAlloc_,944,_ZN4ksys3evt10OrderParam8tryAllocENS0_14OrderParamTypeEjRKN4sead14SafeStringBaseIcEE
+0x0000007100db5598,ksys::evt::OrderParam::addParamActor,240,_ZN4ksys3evt10OrderParam13addParamActorEPNS_3act8BaseProcERN4sead14SafeStringBaseIcEE
+0x0000007100db5688,ksys::evt::OrderParam::getIntByName,176,_ZNK4ksys3evt10OrderParam12getIntByNameERKN4sead14SafeStringBaseIcEEPPj
+0x0000007100db5738,ksys::evt::OrderParam::getStringByName,176,_ZNK4ksys3evt10OrderParam15getStringByNameERKN4sead14SafeStringBaseIcEEPPS4_
+0x0000007100db57e8,ksys::evt::OrderParam::getArrayByName,208,_ZNK4ksys3evt10OrderParam14getArrayByNameERKN4sead14SafeStringBaseIcEEPPvPj
 0x0000007100db58b8,evt::EventFlowBase::ctor,2140,
 0x0000007100db6114,_ZN4sead9SafeArrayINS_15FixedSafeStringILi64EEELi8EEC2Ev,360,
 0x0000007100db627c,evt::EventFlowBase::getBaseProcLink,12,
diff --git a/src/KingSystem/Event/CMakeLists.txt b/src/KingSystem/Event/CMakeLists.txt
index 0de91345..2ba90f45 100644
--- a/src/KingSystem/Event/CMakeLists.txt
+++ b/src/KingSystem/Event/CMakeLists.txt
@@ -5,4 +5,6 @@ target_sources(uking PRIVATE
   evtInfoData.h
   evtManager.cpp
   evtManager.h
+  evtOrderParam.cpp
+  evtOrderParam.h
 )
diff --git a/src/KingSystem/Event/evtEvent.cpp b/src/KingSystem/Event/evtEvent.cpp
index 9577e6a3..8addcda3 100644
--- a/src/KingSystem/Event/evtEvent.cpp
+++ b/src/KingSystem/Event/evtEvent.cpp
@@ -1 +1,8 @@
 #include "KingSystem/Event/evtEvent.h"
+#include "KingSystem/Event/evtManager.h"
+#include "KingSystem/Event/evtOrderParam.h"
+
+namespace ksys::evt {
+
+Event::Event() {}
+}  // namespace ksys::evt
\ No newline at end of file
diff --git a/src/KingSystem/Event/evtEvent.h b/src/KingSystem/Event/evtEvent.h
index ac6a8a94..3d5c255b 100644
--- a/src/KingSystem/Event/evtEvent.h
+++ b/src/KingSystem/Event/evtEvent.h
@@ -1,10 +1,12 @@
 #pragma once
 
 #include <basis/seadTypes.h>
+#include <prim/seadSafeString.h>
 #include <prim/seadTypedBitFlag.h>
 
 namespace ksys::evt {
 
+class OrderParam;
 // TODO
 class Event {
 public:
diff --git a/src/KingSystem/Event/evtManager.h b/src/KingSystem/Event/evtManager.h
index 0850d534..4d192721 100644
--- a/src/KingSystem/Event/evtManager.h
+++ b/src/KingSystem/Event/evtManager.h
@@ -16,6 +16,8 @@ public:
     void init(sead::Heap* heap);
 
     Event* getActiveEvent() const;
+
+    sead::Heap* mEventHeap;  // 0x1d180
 };
 
 }  // namespace ksys::evt
diff --git a/src/KingSystem/Event/evtOrderParam.cpp b/src/KingSystem/Event/evtOrderParam.cpp
new file mode 100644
index 00000000..0504ed5e
--- /dev/null
+++ b/src/KingSystem/Event/evtOrderParam.cpp
@@ -0,0 +1,294 @@
+#include "KingSystem/Event/evtOrderParam.h"
+#include <codec/seadHashCRC32.h>
+#include <container/seadBuffer.h>
+#include <heap/seadExpHeap.h>
+#include <prim/seadSafeString.h>
+#include "KingSystem/ActorSystem/actBaseProcLink.h"
+
+namespace ksys::evt {
+
+OrderParam::OrderParam(sead::Heap* heap) {
+    mHeap = heap;
+}
+
+OrderParam::~OrderParam() {
+    uninitialize();
+}
+
+bool OrderParam::initialize(s32 entry_count) {
+    sead::FixedSafeString<0x100> error_message;
+
+    error_message.format("[%s] initialize(%d) is failed.", "ksys::evt::OrderParam", entry_count);
+    uninitialize();
+    if (!entry_count)
+        return true;
+    if (!mHeap)
+        return false;
+    if (!mEntries.tryAllocBuffer(entry_count, mHeap))
+        return false;
+
+    for (u32 i = 0; i < u32(entry_count); i++)
+        mEntries[i].clear();
+
+    mEntryCount = 0;
+    mInitialized = true;
+    return true;
+}
+
+void OrderParam::uninitialize() {
+    for (s32 i = 0; i < mEntries.size(); i++) {
+        auto& entry = mEntries[i];
+        if (entry.name)
+            delete (entry.name);
+        auto* ptr = entry.data;
+        if (ptr) {
+            switch (entry.type) {
+            case OrderParamType::String:
+                delete static_cast<sead::SafeString*>(ptr);
+                break;
+            case OrderParamType::Int:
+                delete static_cast<s32*>(ptr);
+                break;
+            case OrderParamType::Float:
+                delete static_cast<f32*>(ptr);
+                break;
+            case OrderParamType::Bool:
+                delete static_cast<bool*>(ptr);
+                break;
+            case OrderParamType::Actor:
+                delete static_cast<act::BaseProcLink*>(ptr);
+                break;
+            case OrderParamType::Array:
+                mHeap->free(ptr);
+                break;
+            default:
+                break;
+            }
+        }
+        entry.clear();
+    }
+    mEntries.freeBuffer();
+    mEntryCount = 0;
+    mInitialized = false;
+}
+
+const OrderParamEntry* OrderParam::getParam(const s32 index) const {
+    sead::FixedSafeString<0x100> error_message;
+
+    error_message.format("[%s] getParam(%d) is failed.", "ksys::evt::OrderParam", index);
+    if (u32(std::max(0, mEntries.size())) > u32(index)) {
+        return &mEntries[index];
+    } else {
+        return nullptr;
+    }
+}
+
+OrderParam& OrderParam::operator=(const OrderParam& other) {
+    if (this != &other) {
+        doAssign(other);
+    }
+    return *this;
+}
+
+bool OrderParam::doAssign(const OrderParam& other) {
+    if (this == &other)
+        return true;
+
+    if (!initialize(std::max(0, other.mEntries.size())))
+        return false;
+    for (s32 i = 0; i < mEntries.size(); i++) {
+        auto* other_entry = other.getParam(i);
+        if (other_entry) {
+            auto* other_ptr = other_entry->data;
+            auto* other_name = other_entry->name;
+            ksys::act::BaseProcLink* link_ptr;
+            ksys::act::BaseProc* actor_ptr;
+            if (other_ptr && other_name) {
+                switch (other_entry->type) {
+                case OrderParamType::Int:
+                    if (!addParamInt(*static_cast<s32*>(other_ptr), *other_name))
+                        return false;
+                    break;
+                case OrderParamType::Float:
+                    if (!addParamFloat(*static_cast<f32*>(other_ptr), *other_name))
+                        return false;
+                    break;
+                case OrderParamType::String:
+                    if (!addParamString(*static_cast<sead::SafeString*>(other_ptr), *other_name))
+                        return false;
+                    break;
+                case OrderParamType::Bool:
+                    if (!addParamBool(*static_cast<bool*>(other_ptr), *other_name))
+                        return false;
+                    break;
+                case OrderParamType::Actor:
+                    link_ptr = static_cast<ksys::act::BaseProcLink*>(other_ptr);
+                    actor_ptr =
+                        sead::DynamicCast<ksys::act::BaseProc>(link_ptr->getProc(nullptr, nullptr));
+                    if (!addParamActor(actor_ptr, *other_name))
+                        return false;
+                    break;
+                case OrderParamType::Array:
+                    if (!addParamArray(static_cast<char*>(other_ptr), other_entry->size,
+                                       *other_name))
+                        return false;
+                    break;
+                default:
+                    break;
+                }
+            }
+        }
+    }
+    return true;
+}
+
+bool OrderParam::addParamInt(s32 val, const sead::SafeString& name) {
+    auto* entry_ptr = tryAllocParam<s32>(name, OrderParamType::Int);
+    if (!entry_ptr)
+        return false;
+    *entry_ptr = val;
+    ++mEntryCount;
+    return true;
+}
+
+bool OrderParam::addParamFloat(f32 val, const sead::SafeString& name) {
+    auto* entry_ptr = tryAllocParam<f32>(name, OrderParamType::Float);
+    if (!entry_ptr)
+        return false;
+    *entry_ptr = val;
+    ++mEntryCount;
+    return true;
+}
+
+bool OrderParam::addParamString(const sead::SafeString& val, const sead::SafeString& name) {
+    auto* entry_ptr = tryAllocParam<sead::BufferedSafeString>(name, OrderParamType::String);
+    if (!entry_ptr)
+        return false;
+    entry_ptr->copy(val);
+    ++mEntryCount;
+    return true;
+}
+
+bool OrderParam::addParamBool(bool val, const sead::SafeString& name) {
+    auto* entry_ptr = tryAllocParam<bool>(name, OrderParamType::Bool);
+    if (!entry_ptr)
+        return false;
+    *entry_ptr = val;
+    ++mEntryCount;
+    return true;
+}
+
+bool OrderParam::addParamActor(ksys::act::BaseProc* actor, sead::SafeString& name) {
+    auto* entry_ptr = tryAllocParam<ksys::act::BaseProcLink>(name, OrderParamType::Actor);
+    if (!entry_ptr)
+        return false;
+    if (!entry_ptr->acquire(actor, false))
+        return false;
+    ++mEntryCount;
+    return true;
+}
+
+bool OrderParam::addParamArray(char* array, u32 size, sead::SafeString& name) {
+    auto* entry_ptr = tryAllocParam<char>(name, OrderParamType::Array, size);
+    if (!entry_ptr)
+        return false;
+    std::memcpy(entry_ptr, array, size);
+    ++mEntryCount;
+    return true;
+}
+
+bool OrderParam::getIntByName(const sead::SafeString& name, u32** out_ptr) const {
+    return getPointerByName(name, out_ptr, OrderParamType::Int);
+}
+
+bool OrderParam::getStringByName(const sead::SafeString& name, sead::SafeString** out_ptr) const {
+    return getPointerByName(name, out_ptr, OrderParamType::String);
+}
+
+bool OrderParam::getArrayByName(const sead::SafeString& name, void** out_ptr, u32* out_size) const {
+    return getPointerByName(name, out_ptr, OrderParamType::Array, out_size);
+}
+
+OrderParamEntry* OrderParam::getFreeEntry() {
+    for (s32 i = 0; i < mEntries.size(); i++) {
+        auto* entry = &mEntries[i];
+        if (!entry->data) {
+            return entry;
+        }
+    }
+    return nullptr;
+}
+
+OrderParamEntry* OrderParam::tryAlloc(OrderParamType type, u32 size, const sead::SafeString& name) {
+    sead::FixedSafeString<0x100> error_message;
+
+    error_message.format("[%s] tryAlloc_(%d, %d, %s) is failed.", "ksys::evt::OrderParam",
+                         static_cast<u16>(type), size, name.cstr());
+
+    OrderParamEntry* entry = getFreeEntry();
+
+    if (!entry)
+        return nullptr;
+    auto* heap = mHeap;
+    if (!heap)
+        return nullptr;
+
+    entry->name = new (heap, std::nothrow_t()) sead::FixedSafeString<0x20>(name);
+
+    switch (type) {
+    case OrderParamType::Int:
+        entry->data = new (heap, std::nothrow_t()) s32();
+        entry->size = sizeof(s32);
+        break;
+    case OrderParamType::Float:
+        entry->data = new (heap, std::nothrow_t()) f32();
+        entry->size = sizeof(f32);
+        break;
+    case OrderParamType::String:
+        entry->data = new (heap, std::nothrow_t()) sead::FixedSafeString<0x40>;
+        entry->size = sizeof(sead::FixedSafeString<0x40>);
+        break;
+    case OrderParamType::Bool:
+        entry->data = new (heap, std::nothrow_t()) bool();
+        entry->size = sizeof(bool);
+        break;
+    case OrderParamType::Actor:
+        entry->data = new (heap, std::nothrow_t()) ksys::act::BaseProcLink;
+        entry->size = sizeof(act::BaseProcLink);
+        break;
+    case OrderParamType::Array:
+        entry->data = new (heap, std::nothrow_t()) char[size];
+        entry->size = size;
+        break;
+    default:
+        break;
+    }
+
+    auto* ptr = entry->data;
+
+    if (ptr) {
+        entry->hash = sead::HashCRC32::calcStringHash(*entry->name);
+        entry->type = type;
+        return entry;
+    }
+
+    if (entry->name)
+        delete entry->name;
+    entry->clear();
+    return nullptr;
+}
+
+void* OrderParam::getPointerByName(const sead::SafeString& name, OrderParamType type,
+                                   u32* out_size) const {
+    const u32 hash = sead::HashCRC32::calcStringHash(name);
+    for (s32 i = 0; i < mEntries.size(); i++) {
+        if (mEntries[i].hash == hash && mEntries[i].type == type) {
+            if (out_size)
+                *out_size = mEntries[i].size;
+            return mEntries[i].data;
+        }
+    }
+    return nullptr;
+}
+
+}  // namespace ksys::evt
diff --git a/src/KingSystem/Event/evtOrderParam.h b/src/KingSystem/Event/evtOrderParam.h
new file mode 100644
index 00000000..d53c02fa
--- /dev/null
+++ b/src/KingSystem/Event/evtOrderParam.h
@@ -0,0 +1,93 @@
+#pragma once
+
+#include <basis/seadTypes.h>
+#include <codec/seadHashCRC32.h>
+#include <container/seadBuffer.h>
+#include <heap/seadExpHeap.h>
+#include "KingSystem/ActorSystem/actBaseProc.h"
+
+namespace ksys::evt {
+
+enum class OrderParamType : u16 {
+    Invalid = 0,
+    Int = 1,
+    Float = 2,
+    String = 3,
+    Bool = 4,
+    Actor = 5,
+    Array = 6,
+};
+
+struct OrderParamEntry {
+    void clear() {
+        hash = 0;
+        size = 0;
+        type = OrderParamType::Invalid;
+        name = nullptr;
+        data = nullptr;
+    }
+
+    u32 hash;
+    sead::SafeString* name;
+    void* data;
+    u32 size;
+    OrderParamType type;
+};
+
+class OrderParam {
+public:
+    explicit OrderParam(sead::Heap* heap);
+    OrderParam(const OrderParam& other) { *this = other; }
+    virtual ~OrderParam();
+    OrderParam& operator=(const OrderParam& other);
+    bool initialize(s32 entry_count);
+    void uninitialize();
+
+    const OrderParamEntry* getParam(s32 index) const;
+    bool addParamInt(s32 val, const sead::SafeString& name);
+    bool addParamFloat(f32 val, const sead::SafeString& name);
+    bool addParamString(const sead::SafeString& val, const sead::SafeString& name);
+    bool addParamBool(bool val, const sead::SafeString& name);
+    bool addParamActor(ksys::act::BaseProc* actor, sead::SafeString& name);
+    bool addParamArray(char* array, u32 size, sead::SafeString& name);
+
+    OrderParamEntry* tryAlloc(OrderParamType type, u32 size, const sead::SafeString& name);
+    bool getIntByName(const sead::SafeString& name, u32** out_ptr) const;
+    bool getStringByName(const sead::SafeString& name, sead::SafeString** out_ptr) const;
+    bool getArrayByName(const sead::SafeString& name, void** out_ptr, u32* out_size) const;
+
+private:
+    bool doAssign(const OrderParam& other);
+
+    OrderParamEntry* getFreeEntry();
+    void* getPointerByName(const sead::SafeString& name, OrderParamType type,
+                           u32* out_size = nullptr) const;
+
+    template <typename T>
+    bool getPointerByName(const sead::SafeString& name, T** out_ptr, OrderParamType type,
+                          u32* out_size = nullptr) const {
+        auto* ptr = getPointerByName(name, type, out_size);
+        if (!ptr)
+            return false;
+        *out_ptr = static_cast<T*>(ptr);
+        return true;
+    }
+
+    template <typename T>
+    T* tryAllocParam(const sead::SafeString& name, OrderParamType type, u32 size = 0) {
+        auto* ptr = getPointerByName(name, type);
+        if (ptr)
+            return nullptr;
+
+        auto* entry = tryAlloc(type, size, name);
+        if (!entry || !entry->data)
+            return nullptr;
+        return static_cast<T*>(entry->data);
+    }
+
+    sead::Heap* mHeap;
+    sead::Buffer<OrderParamEntry> mEntries;
+    u32 mEntryCount = 0;
+    bool mInitialized = false;
+};
+}  // namespace ksys::evt
diff --git a/workflow.sh b/workflow.sh
index 4f89dae9..8e0cee7b 100755
--- a/workflow.sh
+++ b/workflow.sh
@@ -6,7 +6,7 @@
 # Diff a function (in this example, OrderParam::doAssign, -v is equivalent to --source in diff.py)
 #   ./workflow.sh diff -v _ZN4ksys3evt10OrderParam13addParamActorEPNS_3act8BaseProcERN4sead14SafeStringBaseIcEE
 # Search for mangle name and diff (-f turns off interaction)
-#   ./workflow.sh mad -v -f _ZN4ksys3evt10OrderParam13addParamActorEPNS_3act8BaseProcERN4sead14SafeStringBaseIcEE
+#   ./workflow.sh mad -v -f orderparam::doassign
 # Get ready to pr
 #   ./workflow.sh check