diff --git a/chat_server/server_utils/models/personas.py b/chat_server/server_utils/models/personas.py
index 2ba721a9..a5d23bcb 100644
--- a/chat_server/server_utils/models/personas.py
+++ b/chat_server/server_utils/models/personas.py
@@ -48,13 +48,19 @@ def persona_id(self):
 
 
 class AddPersonaModel(Persona):
-    supported_llms: list[str] = Field(examples=[["chatgpt", "llama", "fastchat"]])
+    supported_llms: list[str] = Field(
+        examples=[["chat_gpt", "llama", "fastchat"]], default=[]
+    )
+    default_llm: str | None = Field(examples=["chat_gpt"], default=None)
     description: str = Field(examples=["I am the doctor. I am helping people."])
     enabled: bool = False
 
 
 class SetPersonaModel(Persona):
-    supported_llms: list[str] = Field(examples=[["chatgpt", "llama", "fastchat"]])
+    supported_llms: list[str] = Field(
+        examples=[["chat_gpt", "llama", "fastchat"]], default=[]
+    )
+    default_llm: str | None = Field(examples=["chat_gpt"], default=None)
     description: str = Field(examples=["I am the doctor. I am helping people."])
 
 
diff --git a/services/klatchat_observer/controller.py b/services/klatchat_observer/controller.py
index 3c058b1b..2e0305cd 100644
--- a/services/klatchat_observer/controller.py
+++ b/services/klatchat_observer/controller.py
@@ -28,6 +28,8 @@
 import json
 import re
 import time
+import cachetools.func
+
 from threading import Event, Timer
 
 import requests
@@ -96,6 +98,7 @@ def __init__(
         self.server_url = self.sio_url
         self._klat_session_token = None
         self.klat_auth_credentials = config.get("KLAT_AUTH_CREDENTIALS", {})
+        self.default_persona_llms = dict()
         self.connect_sio()
         self.register_consumer(
             name="neon_response",
@@ -206,8 +209,7 @@ def get_recipient_from_prefix(cls, message: str) -> dict:
                     break
         return callback
 
-    @staticmethod
-    def get_recipient_from_body(message: str) -> dict:
+    def get_recipient_from_body(self, message: str) -> dict:
         """
         Gets recipients from message body
 
@@ -215,7 +217,7 @@ def get_recipient_from_body(message: str) -> dict:
         :returns extracted recipient
 
         Example:
-        >>> assert ChatObserver.get_recipient_from_body('@Proctor hello dsfdsfsfds @Prompter') == {'recipient': Recipients.CHATBOT_CONTROLLER, 'context': {'requested_participants': {'proctor', 'prompter'}}
+        >>> assert self.get_recipient_from_body('@Proctor hello dsfdsfsfds @Prompter') == {'recipient': Recipients.CHATBOT_CONTROLLER, 'context': {'requested_participants': {'proctor', 'prompter'}}
         """
         message = " " + message
         bot_mentioning_regexp = r"[\s]+@[a-zA-Z]+[\w]+"
@@ -225,17 +227,24 @@ def get_recipient_from_body(message: str) -> dict:
             recipient = Recipients.CHATBOT_CONTROLLER
         else:
             recipient = Recipients.UNRESOLVED
-        return {"recipient": recipient, "context": {"requested_participants": bots}}
+        return {
+            "recipient": recipient,
+            "context": {
+                "requested_participants": [
+                    self.default_persona_llms.get(bot, bot) for bot in bots
+                ]
+            },
+        }
 
-    @staticmethod
-    def get_recipient_from_bound_service(bound_service) -> dict:
+    def get_recipient_from_bound_service(self, bound_service) -> dict:
         """Gets recipient in case bounded service is received in data"""
         response = {}
         if bound_service.startswith("chatbots"):
+            bot = bound_service.split(".")[1].split(",")
             response = {
                 "recipient": Recipients.CHATBOT_CONTROLLER,
                 "context": {
-                    "requested_participants": bound_service.split(".")[1].split(",")
+                    "requested_participants": self.default_persona_llms.get(bot, bot)
                 },
             }
         elif bound_service.startswith("neon"):
@@ -743,7 +752,12 @@ def on_subminds_state(self, body: dict):
 
     @create_mq_callback()
     def on_get_configured_personas(self, body: dict):
-        response_data = self._fetch_persona_api(body=body)
+        response_data = self._fetch_persona_api(user_id=body.get("user_id"))
+        response_data["items"] = [
+            item
+            for item in response_data["items"]
+            if body["service_name"] in item["supported_llms"]
+        ]
         response_data.setdefault("context", {}).setdefault("mq", {}).setdefault(
             "message_id", body["message_id"]
         )
@@ -754,20 +768,27 @@ def on_get_configured_personas(self, body: dict):
             expiration=3000,
         )
 
-    def _fetch_persona_api(self, body: dict) -> dict:
-        query_string = self._build_persona_api_query(body=body)
+    @cachetools.func.ttl_cache(ttl=2 * 60)
+    def _fetch_persona_api(self, user_id: str) -> dict:
+        query_string = self._build_persona_api_query(user_id=user_id)
         url = f"{self.server_url}/personas/list?{query_string}"
         try:
             response = self._fetch_klat_server(url=url)
             data = response.json()
+            self._refresh_default_persona_llms(data=data)
         except KlatAPIAuthorizationError:
             LOG.error(f"Failed to fetch personas from {url = }")
             data = {"items": []}
         return data
 
-    def _build_persona_api_query(self, body: dict) -> str:
-        url_query_params = f"llms={body['service_name']}&only_enabled=true"
-        if user_id := body.get("user_id"):
+    def _refresh_default_persona_llms(self, data):
+        for item in data["items"]:
+            if default_llm := item.get("default_llm"):
+                self.default_persona_llms[item["id"]] = item["id"] + "_" + default_llm
+
+    def _build_persona_api_query(self, user_id: str) -> str:
+        url_query_params = f"only_enabled=true"
+        if user_id:
             url_query_params += f"&user_id={user_id}"
         return url_query_params