diff --git a/src/npc/bigGoron.c b/src/npc/bigGoron.c
index 0245c49c..bf981b2d 100644
--- a/src/npc/bigGoron.c
+++ b/src/npc/bigGoron.c
@@ -165,7 +165,7 @@ void sub_0806D274(Entity* this) {
         this->frameIndex = 2;
         this->actionDelay = 8;
         SetDefaultPriority(this, PRIO_MESSAGE);
-        npc = CreateNPC(0x4c, 3, 0);
+        npc = CreateNPC(BIG_GORON, 3, 0);
         if (npc != NULL) {
             npc->child = this;
         }
@@ -271,7 +271,7 @@ void sub_0806D41C(Entity* this) {
 }
 
 void sub_0806D4C0(Entity* this, u32 param) {
-    Entity* npc = CreateNPC(0x4c, param + 6, 0);
+    Entity* npc = CreateNPC(BIG_GORON, param + 6, 0);
     if (npc != NULL) {
         npc->parent = this;
         CopyPosition(this, npc);
diff --git a/src/npc/gregal.c b/src/npc/gregal.c
index 5769c8ac..34f5dbd6 100644
--- a/src/npc/gregal.c
+++ b/src/npc/gregal.c
@@ -18,13 +18,13 @@ void sub_0806CAF4(Entity* this) {
     if (this->action == 0) {
         this->action += 1;
         SetDefaultPriority(this, PRIO_MESSAGE);
-        npc = CreateNPC(0x4a, 1, 0);
+        npc = CreateNPC(GREGAL, 1, 0);
         if (npc != NULL) {
             npc->parent = this;
             CopyPosition(this, npc);
             SortEntityBelow(this, npc);
         }
-        npc = CreateNPC(0x4a, 2, 0);
+        npc = CreateNPC(GREGAL, 2, 0);
         if (npc != NULL) {
             npc->parent = this;
             CopyPosition(this, npc);
diff --git a/src/npc/npc5.c b/src/npc/npc5.c
index 3305d1a3..5b98f450 100644
--- a/src/npc/npc5.c
+++ b/src/npc/npc5.c
@@ -82,7 +82,7 @@ extern u16* gUnk_0810B660[8];
 void CreateZeldaFollower(void) {
     Entity* npc;
     if (CheckGlobalFlag(0x1c) != 0) {
-        npc = CreateNPC(0x2e, 0, 0);
+        npc = CreateNPC(ZELDA_FOLLOWER, 0, 0);
         if (npc != NULL) {
             CopyPosition(&gPlayerEntity, npc);
             npc->flags |= ENT_PERSIST;
@@ -150,7 +150,7 @@ void sub_08060AE0(Entity* this) {
         this->field_0x17 &= 0xfe;
         this->field_0x6c.HALF.LO = 0xff;
         sub_08060E70(this, this->animationState);
-        otherNpc = CreateNPC(5, 2, 0);
+        otherNpc = CreateNPC(NPC_UNK_5, 2, 0);
         if (otherNpc != NULL) {
             otherNpc->parent = this;
             *(Entity**)&this->field_0x78 = otherNpc;
diff --git a/src/npc/picolyteBottle.c b/src/npc/picolyteBottle.c
index c25faa66..7af8027d 100644
--- a/src/npc/picolyteBottle.c
+++ b/src/npc/picolyteBottle.c
@@ -4,6 +4,7 @@
 #include "functions.h"
 #include "message.h"
 #include "object.h"
+#include "npc.h"
 
 extern ScreenTransitionData gUnk_0813AD4C;
 
@@ -28,13 +29,13 @@ void sub_0806DF00(Entity* this) {
 
     if (this->type == 0) {
         this->action = 1;
-        npc = CreateNPC(0x51, 1, 0);
+        npc = CreateNPC(PICOLYTE_BOTTLE, 1, 0);
         *(Entity**)&this->field_0x68 = npc;
         npc->parent = this;
-        npc = CreateNPC(0x51, 1, 1);
+        npc = CreateNPC(PICOLYTE_BOTTLE, 1, 1);
         *(Entity**)&this->field_0x6c = npc;
         npc->parent = this;
-        npc = CreateNPC(0x51, 1, 2);
+        npc = CreateNPC(PICOLYTE_BOTTLE, 1, 2);
         *(Entity**)&this->field_0x70 = npc;
         npc->parent = this;
         this->field_0x74.HWORD = 0;
diff --git a/src/npc/rem.c b/src/npc/rem.c
index 84fca459..392c8198 100644
--- a/src/npc/rem.c
+++ b/src/npc/rem.c
@@ -198,7 +198,7 @@ void sub_0806A830(Entity* this) {
     GetNextFrame(this);
     if (this->frame == 1) {
         this->frame = 0;
-        npc = CreateNPC(0x37, 5, 0);
+        npc = CreateNPC(REM, 5, 0);
         if (npc != NULL) {
             PositionEntityOnTop(this, npc);
         }
@@ -219,11 +219,11 @@ void sub_0806A890(Entity* this) {
 
 void sub_0806A8C8(Entity* this) {
     Entity* entity;
-    if ((CheckLocalFlag(SHOP02_KUTSU_00) == 0) && (entity = CreateNPC(0x37, 2, 0), entity != NULL)) {
+    if ((CheckLocalFlag(SHOP02_KUTSU_00) == 0) && (entity = CreateNPC(REM, 2, 0), entity != NULL)) {
         CopyPosition(this, entity);
         entity->parent = this;
     }
-    entity = CreateNPC(0x37, 3, 0);
+    entity = CreateNPC(REM, 3, 0);
     if (entity != NULL) {
         CopyPosition(this, entity);
         entity->y.HALF.HI += 2;
@@ -232,7 +232,7 @@ void sub_0806A8C8(Entity* this) {
 }
 
 void sub_0806A914(Entity* this) {
-    Entity* npc = CreateNPC(0x37, 1, 0);
+    Entity* npc = CreateNPC(REM, 1, 0);
     if (npc != NULL) {
         CopyPosition(this, npc);
         SortEntityAbove(this, npc);
@@ -276,7 +276,7 @@ void sub_0806A9B0(Entity* this, ScriptExecutionContext* context) {
 }
 
 void sub_0806A9E8(Entity* this) {
-    Entity* npc = CreateNPC(0x37, 4, 0);
+    Entity* npc = CreateNPC(REM, 4, 0);
     if (npc != NULL) {
         CopyPosition(this, npc);
         SortEntityBelow(this, npc);
diff --git a/src/npc/zelda.c b/src/npc/zelda.c
index 4842ec83..90222873 100644
--- a/src/npc/zelda.c
+++ b/src/npc/zelda.c
@@ -70,7 +70,7 @@ void sub_08066D94(Entity* this) {
     Entity* npc;
 
     SetGlobalFlag(ZELDA_CHASE);
-    npc = CreateNPC(0x2E, 0, 0);
+    npc = CreateNPC(ZELDA_FOLLOWER, 0, 0);
     if (npc != NULL) {
         npc->animationState = gPlayerEntity.animationState;
         npc->flags |= ENT_PERSIST;
diff --git a/src/npcUtils.c b/src/npcUtils.c
index 653a7531..910926bd 100644
--- a/src/npcUtils.c
+++ b/src/npcUtils.c
@@ -28,7 +28,7 @@ static void sub_0806EF4C(Entity*, u16*);
 static u32 sub_0806EF74(Entity*, u32);
 
 void sub_0806EC20(Entity* ent) {
-    Entity* e = CreateNPC(0x58, 0, 0);
+    Entity* e = CreateNPC(NPC_UNK_58, 0, 0);
     if (e != NULL) {
         e->parent = ent;
     }