diff --git a/code/modules/admin/fun_balloon.dm b/code/modules/admin/fun_balloon.dm
index b65f72f8f4d..c95fce43dc9 100644
--- a/code/modules/admin/fun_balloon.dm
+++ b/code/modules/admin/fun_balloon.dm
@@ -38,6 +38,8 @@
 	desc = "When this pops, things are gonna get more aware around here."
 	var/group_name = "a bunch of giant spiders"
 	var/effect_range = 3
+	var/antag_type = null
+	var/make_antag = FALSE
 
 /obj/effect/fun_balloon/sentience/ui_interact(mob/user, datum/tgui/ui)
 	ui = SStgui.try_update_ui(user, src, ui)
@@ -49,6 +51,7 @@
 	var/list/data = list()
 	data["group_name"] = group_name
 	data["range"] = effect_range
+	data["antag"] = make_antag
 	return data
 
 /obj/effect/fun_balloon/sentience/ui_state(mob/user)
@@ -73,6 +76,11 @@
 		if("effect_range")
 			effect_range = params["updated_range"]
 
+		if("select_antag")
+			var/list/paths = subtypesof(/datum/antagonist)
+			antag_type = input(usr,"Select antag", "Antagonist selection") as null|anything in sort_list(paths)
+			make_antag = TRUE
+
 		if("pop")
 			if(!popped)
 				popped = TRUE
@@ -105,6 +113,9 @@
 		message_admins("[key_name_admin(C)] has taken control of ([key_name_admin(body)])")
 		body.ghostize(FALSE)
 		body.key = C.key
+		if (make_antag)
+			body.mind.add_antag_datum(antag_type)
+			continue
 		new /obj/effect/temp_visual/gravpush(get_turf(body))
 
 // ----------- Emergency Shuttle Balloon
diff --git a/tgui/packages/tgui/interfaces/SentienceFunBalloon.jsx b/tgui/packages/tgui/interfaces/SentienceFunBalloon.jsx
index 62330cc6a05..ab4353aab28 100644
--- a/tgui/packages/tgui/interfaces/SentienceFunBalloon.jsx
+++ b/tgui/packages/tgui/interfaces/SentienceFunBalloon.jsx
@@ -11,9 +11,9 @@ import { Window } from '../layouts';
 
 export const SentienceFunBalloon = (props) => {
   const { act, data } = useBackend();
-  const { group_name, range } = data;
+  const { group_name, range, antag } = data;
   return (
-    <Window title={'Sentience Fun Balloon'} width={400} height={175}>
+    <Window title={'Sentience Fun Balloon'} width={400} height={200}>
       <Window.Content>
         <Stack vertical>
           <Section title="Configure balloon effect:">
@@ -44,6 +44,14 @@ export const SentienceFunBalloon = (props) => {
                   }
                 />
               </LabeledList.Item>
+              <LabeledList.Item label="Make group into antagonists?">
+                <Button.Checkbox
+                  icon={data.antag ? 'user-secret' : 'times'}
+                  content={data.antag ? 'Yes' : 'No'}
+                  selected={data.antag}
+                  onClick={() => act('select_antag')}
+                />
+              </LabeledList.Item>
             </LabeledList>
           </Section>
           <Section>