for now

addon.txt

@@ -16,8 +16,12 @@ If you want your enemies to be more human, this mod will change all hostile NPC
 - Change the behavior of custom models NPCs from combine to citizen
 - Allows hostile to attack with melee weapons
 
----
-
 I'll make VJ version if i can
 
+---
+
+models used:
+- Lenna https://steamcommunity.com/sharedfiles/filedetails/?id=3167885628
+- Tomoko https://steamcommunity.com/sharedfiles/filedetails/?id=3133369749
+
 Note: i couldn't find a mod similar to the one i made, so i don't know who made it first.

lua/autorun/hostile_npcs_tocitizen.lua

@@ -1,17 +1,61 @@
 local npcs = list.Get("NPC")
 local citizenEnemy = npcs["npc_citizen_rebel_enemy"]
+local originalListSet = list.Set
 
-if citizenEnemy then
-    for class, npc in pairs(npcs) do
+function list.Set(listType, class, npc)
+    if listType == "NPC" then
         if npc["Class"] == "npc_combine_s" and npc["Category"] ~= "#spawnmenu.category.combine" then
-            npc["Class"] = citizenEnemy["Class"]
-            npc["KeyValues"] = {
-                Hostile = 1,
-                SquadName =	"overwatch",
-                citizentype = 4
-            }
+            if !npc["KeyValues"] then
+                npc["KeyValues"] = {}
+            end
+            npc["KeyValues"]["SquadName"] = "m_EnemyRebel"
+        end
+    end
+    originalListSet(listType, class, npc)
+end
 
-            list.Set("NPC", class, npc)
+hook.Add("OnEntityCreated", "ForceReplaceCombine", function(ent)
+    timer.Simple(0, function()
+        if !SERVER then return end
+        if not IsValid(ent) then return end
+
+        if ent:GetClass() == "npc_citizen" then
         end
+
+        if ent:GetKeyValues()["squadname"] == "m_EnemyRebel" then
+            local pos = ent:GetPos()
+            local ang = ent:GetAngles()
+            local mdl = ent:GetModel()
+            local weps = ent:GetWeapons()
+            local health = ent:GetMaxHealth()
+            local keyValues = ent:GetKeyValues()
+
+            ent:Remove()
+    
+            local npc = ents.Create("npc_citizen")
+            if not IsValid(npc) then return end
+            
+            for key, value in pairs(keyValues) do
+                npc:SetKeyValue(key, tostring(value))
+                -- if value ~= "" then
+                -- end
             end
+            
+            npc:SetHealth(health)
+            npc:SetMaxHealth(health)
+
+            npc:SetKeyValue("hostile", 1)
+            npc:SetKeyValue("squadname", "overwatch")
+            npc:SetKeyValue("citizentype", 4)
+
+            for _, wep in ipairs(weps) do
+                npc:Give(wep:GetClass())
             end
+
+            npc:SetPos(pos)
+            npc:SetAngles(ang)
+            npc:SetModel(mdl)
+            npc:Spawn()
+        end
+    end)
+end)