diff --git a/truthinquiry/routes/routes_api_admin.py b/truthinquiry/routes/routes_api_admin.py
index 09ad261..b267825 100644
--- a/truthinquiry/routes/routes_api_admin.py
+++ b/truthinquiry/routes/routes_api_admin.py
@@ -1,7 +1,7 @@
 import os
 
 import flask
-from sqlalchemy import select, delete, or_
+from sqlalchemy import select, delete, and_
 
 from truthinquiry.ext.database.models import *
 from truthinquiry.ext.database.fsa import db
@@ -176,3 +176,36 @@ def delete_npc():
     db.session.execute(delete(Npc).where(Npc.NPC_ID==input_npc_id))
     db.session.commit()
     return {}
+
+@routes_api_admin.route("/setReaction", methods=["GET", "POST"])
+@require_admin(api=True)
+def setReaction():
+    input_npc_id = flask.request.values["npc_id"]
+    input_trait_id = flask.request.values["trait_id"]
+
+    row = db.session.execute(
+        select(Reaction)
+        .where(and_(
+            Reaction.NPC_ID==input_npc_id,
+            Reaction.TRAIT_ID==input_trait_id
+        ))
+    ).first()
+    
+    reaction = None if row == None else row[0]
+    
+
+    if len(flask.request.files) == 0: # want to delete
+        if reaction:
+            db.session.delete(reaction)
+        else:
+            return {"msg": "No such reaction"} # Not an error because this can be intentional
+    else:
+        input_reaction_file = flask.request.files['file']
+        if not reaction:
+            reaction = Reaction(None, input_npc_id, input_trait_id)
+            db.session.add(reaction)
+        reaction.IMG = input_reaction_file.read()
+    
+    db.session.commit()
+    
+    return {}
diff --git a/truthinquiry/static/js/admin_npc.js b/truthinquiry/static/js/admin_npc.js
index 71e23e5..cda9de1 100644
--- a/truthinquiry/static/js/admin_npc.js
+++ b/truthinquiry/static/js/admin_npc.js
@@ -1,4 +1,7 @@
-function createOrUpdateNpc() {
+
+const reactionsDelta = {}
+
+async function createOrUpdateNpc() {
     const data = {};
     data["id"] = document.querySelector("#npc_id").value;
     data["name"] = document.querySelector("#npc_name").value;
@@ -16,9 +19,36 @@ function createOrUpdateNpc() {
         });
     }
 
-    makeAPIRequest("admin/setNpc", {"npc": data, "lang": "FR"}, {"content": "json"}).then(() => {
-        alert("Opération effectuée avec succès");
-    });
+    await makeAPIRequest("admin/setNpc", {"npc": data, "lang": "FR"}, {"content": "json"});
+
+    await uploadReactionsDelta();
+
+    alert("Opération effectuée avec succès");
+}
+
+async function uploadReactionsDelta() {
+    let requests = [];
+
+
+    for(const [reactionId, reactionNode] of Object.entries(reactionsDelta)){
+        const formData = new FormData();
+        formData.append("npc_id", npc_id.value);
+        formData.append("trait_id", reactionId);
+        
+        if(reactionNode === null) formData.append("file", "null");
+        else{
+            const file = reactionNode.querySelector(".img_input").files[0]
+            formData.append("file", file ? file : "");
+        }
+
+        requests.push(makeAPIRequest("admin/setReaction", formData, {"content": "form"}));
+    }
+
+    for(request of requests){
+        await request;
+    }
+
+    
 }
 
 async function deleteNpc() {
@@ -35,12 +65,15 @@ async function deleteNpc() {
 function changeReaction(inputNode){
     const parentNode = inputNode.parentNode;
     const imgNode = parentNode.querySelector('img');
+    const reactionId = parentNode.querySelector('.reaction_id').value;
     
     const reader = new FileReader();
     reader.onload = (e)=>{
         imgNode.src = e.target.result
     }
     reader.readAsDataURL(inputNode.files[0]);
+
+    reactionsDelta[reactionId] = parentNode;
 }
 
 function deleteReaction(node){
@@ -55,6 +88,8 @@ function deleteReaction(node){
     option.innerText = reactionName
 
     reactions_to_add.appendChild(option);
+
+    reactionsDelta[reactionId] = null;
 }
 
 function addReaction(selectNode){
@@ -72,4 +107,6 @@ function addReaction(selectNode){
     newReaction.querySelector("p").innerText = reactionName
     
     reactions.appendChild(newReaction);
+
+    reactionsDelta[reactionId] = newReaction;
 }
\ No newline at end of file
diff --git a/truthinquiry/templates/admin/npc.html b/truthinquiry/templates/admin/npc.html
index 6e98c63..e817808 100644
--- a/truthinquiry/templates/admin/npc.html
+++ b/truthinquiry/templates/admin/npc.html
@@ -51,7 +51,7 @@
 
         <select id="reactions_to_add" onchange="addReaction(this)">
             <option value="" default></option>
-            {%for reaction_to_add in npc.get("reaction_to_add") or []%}
+            {%for reaction_to_add in npc.get("reactions_to_add") or []%}
             <option value="{{reaction_to_add.get('id')}}">{{reaction_to_add.get('name')}}</option>
             {%endfor%}
         </select>