diff --git a/homeassistant/components/conversation/__init__.py b/homeassistant/components/conversation/__init__.py
index 983d2074ab5..a1325171af2 100644
--- a/homeassistant/components/conversation/__init__.py
+++ b/homeassistant/components/conversation/__init__.py
@@ -35,6 +35,7 @@ from .const import (
     ATTR_CONVERSATION_ID,
     ATTR_LANGUAGE,
     ATTR_TEXT,
+    DATA_DEFAULT_ENTITY,
     DOMAIN,
     DOMAIN_DATA,
     HOME_ASSISTANT_AGENT,
@@ -43,7 +44,7 @@ from .const import (
     SERVICE_RELOAD,
     ConversationEntityFeature,
 )
-from .default_agent import async_get_default_agent, async_setup_default_agent
+from .default_agent import async_setup_default_agent
 from .entity import ConversationEntity
 from .http import async_setup as async_setup_conversation_http
 from .models import AbstractConversationAgent, ConversationInput, ConversationResult
@@ -247,8 +248,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
     async def handle_reload(service: ServiceCall) -> None:
         """Reload intents."""
-        agent = async_get_default_agent(hass)
-        await agent.async_reload(language=service.data.get(ATTR_LANGUAGE))
+        await hass.data[DATA_DEFAULT_ENTITY].async_reload(
+            language=service.data.get(ATTR_LANGUAGE)
+        )
 
     hass.services.async_register(
         DOMAIN,
diff --git a/homeassistant/components/conversation/agent_manager.py b/homeassistant/components/conversation/agent_manager.py
index ae7d9551140..25b2a5a4220 100644
--- a/homeassistant/components/conversation/agent_manager.py
+++ b/homeassistant/components/conversation/agent_manager.py
@@ -11,8 +11,12 @@ import voluptuous as vol
 from homeassistant.core import Context, HomeAssistant, async_get_hass, callback
 from homeassistant.helpers import config_validation as cv, singleton
 
-from .const import DOMAIN_DATA, HOME_ASSISTANT_AGENT, OLD_HOME_ASSISTANT_AGENT
-from .default_agent import async_get_default_agent
+from .const import (
+    DATA_DEFAULT_ENTITY,
+    DOMAIN_DATA,
+    HOME_ASSISTANT_AGENT,
+    OLD_HOME_ASSISTANT_AGENT,
+)
 from .entity import ConversationEntity
 from .models import (
     AbstractConversationAgent,
@@ -50,7 +54,7 @@ def async_get_agent(
 ) -> AbstractConversationAgent | ConversationEntity | None:
     """Get specified agent."""
     if agent_id is None or agent_id in (HOME_ASSISTANT_AGENT, OLD_HOME_ASSISTANT_AGENT):
-        return async_get_default_agent(hass)
+        return hass.data[DATA_DEFAULT_ENTITY]
 
     if "." in agent_id:
         return hass.data[DOMAIN_DATA].get_entity(agent_id)
diff --git a/homeassistant/components/conversation/const.py b/homeassistant/components/conversation/const.py
index b7e45142f8f..f4599ef8991 100644
--- a/homeassistant/components/conversation/const.py
+++ b/homeassistant/components/conversation/const.py
@@ -10,6 +10,7 @@ from homeassistant.util.hass_dict import HassKey
 if TYPE_CHECKING:
     from homeassistant.helpers.entity_component import EntityComponent
 
+    from .default_agent import DefaultAgent
     from .entity import ConversationEntity
 
 DOMAIN = "conversation"
@@ -26,6 +27,7 @@ SERVICE_PROCESS = "process"
 SERVICE_RELOAD = "reload"
 
 DOMAIN_DATA: HassKey[EntityComponent[ConversationEntity]] = HassKey(DOMAIN)
+DATA_DEFAULT_ENTITY: HassKey[DefaultAgent] = HassKey(f"{DOMAIN}_default_entity")
 
 
 class ConversationEntityFeature(IntFlag):
diff --git a/homeassistant/components/conversation/default_agent.py b/homeassistant/components/conversation/default_agent.py
index 05b4d194d33..155909d5fe3 100644
--- a/homeassistant/components/conversation/default_agent.py
+++ b/homeassistant/components/conversation/default_agent.py
@@ -44,7 +44,12 @@ from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.event import async_track_state_added_domain
 from homeassistant.util.json import JsonObjectType, json_loads_object
 
-from .const import DEFAULT_EXPOSED_ATTRIBUTES, DOMAIN, ConversationEntityFeature
+from .const import (
+    DATA_DEFAULT_ENTITY,
+    DEFAULT_EXPOSED_ATTRIBUTES,
+    DOMAIN,
+    ConversationEntityFeature,
+)
 from .entity import ConversationEntity
 from .models import ConversationInput, ConversationResult
 from .trace import ConversationTraceEventType, async_conversation_trace_append
@@ -60,16 +65,9 @@ TRIGGER_CALLBACK_TYPE = Callable[
 METADATA_CUSTOM_SENTENCE = "hass_custom_sentence"
 METADATA_CUSTOM_FILE = "hass_custom_file"
 
-DATA_DEFAULT_ENTITY = "conversation_default_entity"
 ERROR_SENTINEL = object()
 
 
-@core.callback
-def async_get_default_agent(hass: core.HomeAssistant) -> DefaultAgent:
-    """Get the default agent."""
-    return hass.data[DATA_DEFAULT_ENTITY]
-
-
 def json_load(fp: IO[str]) -> JsonObjectType:
     """Wrap json_loads for get_intents."""
     return json_loads_object(fp.read())
diff --git a/homeassistant/components/conversation/http.py b/homeassistant/components/conversation/http.py
index 982575b9957..181afeb8525 100644
--- a/homeassistant/components/conversation/http.py
+++ b/homeassistant/components/conversation/http.py
@@ -27,13 +27,11 @@ from .agent_manager import (
     async_get_agent,
     get_agent_manager,
 )
-from .const import DOMAIN_DATA
+from .const import DATA_DEFAULT_ENTITY, DOMAIN_DATA
 from .default_agent import (
     METADATA_CUSTOM_FILE,
     METADATA_CUSTOM_SENTENCE,
-    DefaultAgent,
     SentenceTriggerResult,
-    async_get_default_agent,
 )
 from .entity import ConversationEntity
 from .models import ConversationInput
@@ -173,10 +171,8 @@ async def websocket_hass_agent_debug(
     hass: HomeAssistant, connection: websocket_api.ActiveConnection, msg: dict
 ) -> None:
     """Return intents that would be matched by the default agent for a list of sentences."""
-    agent = async_get_default_agent(hass)
-    assert isinstance(agent, DefaultAgent)
     results = [
-        await agent.async_recognize(
+        await hass.data[DATA_DEFAULT_ENTITY].async_recognize(
             ConversationInput(
                 text=sentence,
                 context=connection.context(msg),
diff --git a/homeassistant/components/conversation/trigger.py b/homeassistant/components/conversation/trigger.py
index 0a4cbfcb7e5..ec7ecc76da0 100644
--- a/homeassistant/components/conversation/trigger.py
+++ b/homeassistant/components/conversation/trigger.py
@@ -14,8 +14,7 @@ from homeassistant.helpers.script import ScriptRunResult
 from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
 from homeassistant.helpers.typing import UNDEFINED, ConfigType
 
-from .const import DOMAIN
-from .default_agent import DefaultAgent, async_get_default_agent
+from .const import DATA_DEFAULT_ENTITY, DOMAIN
 
 
 def has_no_punctuation(value: list[str]) -> list[str]:
@@ -110,7 +109,4 @@ async def async_attach_trigger(
         # two trigger copies for who will provide a response.
         return None
 
-    default_agent = async_get_default_agent(hass)
-    assert isinstance(default_agent, DefaultAgent)
-
-    return default_agent.register_trigger(sentences, call_action)
+    return hass.data[DATA_DEFAULT_ENTITY].register_trigger(sentences, call_action)
diff --git a/tests/components/conversation/test_default_agent.py b/tests/components/conversation/test_default_agent.py
index 935ef205d4f..cf9d575ebe0 100644
--- a/tests/components/conversation/test_default_agent.py
+++ b/tests/components/conversation/test_default_agent.py
@@ -13,6 +13,7 @@ import yaml
 
 from homeassistant.components import conversation, cover, media_player
 from homeassistant.components.conversation import default_agent
+from homeassistant.components.conversation.const import DATA_DEFAULT_ENTITY
 from homeassistant.components.conversation.models import ConversationInput
 from homeassistant.components.cover import SERVICE_OPEN_COVER
 from homeassistant.components.homeassistant.exposed_entities import (
@@ -203,7 +204,7 @@ async def test_exposed_areas(
 @pytest.mark.usefixtures("init_components")
 async def test_conversation_agent(hass: HomeAssistant) -> None:
     """Test DefaultAgent."""
-    agent = default_agent.async_get_default_agent(hass)
+    agent = hass.data[DATA_DEFAULT_ENTITY]
     with patch(
         "homeassistant.components.conversation.default_agent.get_languages",
         return_value=["dwarvish", "elvish", "entish"],
@@ -380,7 +381,7 @@ async def test_trigger_sentences(hass: HomeAssistant) -> None:
     trigger_sentences = ["It's party time", "It is time to party"]
     trigger_response = "Cowabunga!"
 
-    agent = default_agent.async_get_default_agent(hass)
+    agent = hass.data[DATA_DEFAULT_ENTITY]
     assert isinstance(agent, default_agent.DefaultAgent)
 
     callback = AsyncMock(return_value=trigger_response)
@@ -1905,7 +1906,7 @@ async def test_non_default_response(hass: HomeAssistant, init_components) -> Non
     hass.states.async_set("cover.front_door", "closed")
     calls = async_mock_service(hass, "cover", SERVICE_OPEN_COVER)
 
-    agent = default_agent.async_get_default_agent(hass)
+    agent = hass.data[DATA_DEFAULT_ENTITY]
     assert isinstance(agent, default_agent.DefaultAgent)
 
     result = await agent.async_process(
diff --git a/tests/components/conversation/test_http.py b/tests/components/conversation/test_http.py
index 1431fd6c17b..5b6f7072a2d 100644
--- a/tests/components/conversation/test_http.py
+++ b/tests/components/conversation/test_http.py
@@ -8,6 +8,7 @@ import pytest
 from syrupy.assertion import SnapshotAssertion
 
 from homeassistant.components.conversation import default_agent
+from homeassistant.components.conversation.const import DATA_DEFAULT_ENTITY
 from homeassistant.components.light import DOMAIN as LIGHT_DOMAIN
 from homeassistant.const import ATTR_FRIENDLY_NAME
 from homeassistant.core import HomeAssistant
@@ -214,7 +215,7 @@ async def test_ws_prepare(
     hass: HomeAssistant, init_components, hass_ws_client: WebSocketGenerator, agent_id
 ) -> None:
     """Test the Websocket prepare conversation API."""
-    agent = default_agent.async_get_default_agent(hass)
+    agent = hass.data[DATA_DEFAULT_ENTITY]
     assert isinstance(agent, default_agent.DefaultAgent)
 
     # No intents should be loaded yet
diff --git a/tests/components/conversation/test_init.py b/tests/components/conversation/test_init.py
index 34a8fce636d..e92b1ab538f 100644
--- a/tests/components/conversation/test_init.py
+++ b/tests/components/conversation/test_init.py
@@ -9,6 +9,7 @@ import voluptuous as vol
 
 from homeassistant.components import conversation
 from homeassistant.components.conversation import default_agent
+from homeassistant.components.conversation.const import DATA_DEFAULT_ENTITY
 from homeassistant.components.light import DOMAIN as LIGHT_DOMAIN
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import HomeAssistantError
@@ -143,7 +144,7 @@ async def test_prepare_reload(hass: HomeAssistant, init_components) -> None:
     language = hass.config.language
 
     # Load intents
-    agent = default_agent.async_get_default_agent(hass)
+    agent = hass.data[DATA_DEFAULT_ENTITY]
     assert isinstance(agent, default_agent.DefaultAgent)
     await agent.async_prepare(language)
 
@@ -171,7 +172,7 @@ async def test_prepare_fail(hass: HomeAssistant) -> None:
     assert await async_setup_component(hass, "conversation", {})
 
     # Load intents
-    agent = default_agent.async_get_default_agent(hass)
+    agent = hass.data[DATA_DEFAULT_ENTITY]
     assert isinstance(agent, default_agent.DefaultAgent)
     await agent.async_prepare("not-a-language")
 
diff --git a/tests/components/conversation/test_trigger.py b/tests/components/conversation/test_trigger.py
index 3c3e58e7136..903bc405cf0 100644
--- a/tests/components/conversation/test_trigger.py
+++ b/tests/components/conversation/test_trigger.py
@@ -6,6 +6,7 @@ import pytest
 import voluptuous as vol
 
 from homeassistant.components.conversation import default_agent
+from homeassistant.components.conversation.const import DATA_DEFAULT_ENTITY
 from homeassistant.components.conversation.models import ConversationInput
 from homeassistant.core import Context, HomeAssistant, ServiceCall
 from homeassistant.helpers import trigger
@@ -550,7 +551,7 @@ async def test_trigger_with_device_id(hass: HomeAssistant) -> None:
         },
     )
 
-    agent = default_agent.async_get_default_agent(hass)
+    agent = hass.data[DATA_DEFAULT_ENTITY]
     assert isinstance(agent, default_agent.DefaultAgent)
 
     result = await agent.async_process(