diff --git a/gateway/run_voice.py b/gateway/run_voice.py
index 5d6fd672db..128dbddde4 100644
--- a/gateway/run_voice.py
+++ b/gateway/run_voice.py
@@ -237,6 +237,14 @@ class GatewayVoiceMixin:
         recent_store[key] = (recent + [(now, normalized)])[-5:]
         return False
 
+    @staticmethod
+    def _cached_user_display_name(client, user_id: int) -> Optional[str]:
+        """``get_member`` is cache-only; a speaker it misses may still be a cached user, whose display
+        name (global name or username, no server nickname) beats a bare id."""
+        get_user = getattr(client, "get_user", None)
+        name = getattr(get_user(int(user_id)) if callable(get_user) else None, "display_name", None)
+        return name if isinstance(name, str) and name else None
+
     @staticmethod
     def _voice_input_source(adapter, guild_id: int, user_id: int, text_ch_id) -> SessionSource:
         """Bound text channel's own source when available (voice shares the text conversation's
@@ -254,11 +262,13 @@ class GatewayVoiceMixin:
             # join, never another participant's.
             if user_name is None and source.user_id == str(user_id):
                 user_name = source.user_name
+            user_name = user_name or GatewayVoiceMixin._cached_user_display_name(client, user_id)
             source.user_id, source.user_name = str(user_id), user_name or str(user_id)
             # The bound source is the `/voice join` message's; its id is not this turn's trigger
             # (run.py exports it as HERMES_SESSION_MESSAGE_ID for reply anchoring).
             source.message_id = None
         else:
+            user_name = user_name or GatewayVoiceMixin._cached_user_display_name(client, user_id)
             source = SessionSource(
                 platform=Platform.DISCORD, chat_id=str(text_ch_id), user_id=str(user_id),
                 user_name=user_name or str(user_id), chat_type="channel",
diff --git a/tests/gateway/test_discord_turn_prompt_parity.py b/tests/gateway/test_discord_turn_prompt_parity.py
index f58a4fe3ba..2a03097ec9 100644
--- a/tests/gateway/test_discord_turn_prompt_parity.py
+++ b/tests/gateway/test_discord_turn_prompt_parity.py
@@ -137,6 +137,9 @@ async def test_voice_channel_turn_matches_a_typed_turn(monkeypatch: pytest.Monke
         channel.name, channel.topic = "renamed", "New topic"
     if case == "speaker-uncached":
         adapter._client.get_guild = lambda _id: SimpleNamespace(get_member=lambda _uid: None)
+        # Cached as users only: the joiner's bound nickname still beats their global name.
+        adapter._client.get_user = {42: SimpleNamespace(display_name="alice_global"),
+                                    43: SimpleNamespace(display_name="Bob")}.get
     typed = await _typed(adapter, channel)
     runner = object.__new__(gateway_run.GatewayRunner)
     runner.adapters = {Platform.DISCORD: adapter}
@@ -151,6 +154,11 @@ async def test_voice_channel_turn_matches_a_typed_turn(monkeypatch: pytest.Monke
     assert spoken is not typed
     _assert_same_prompt_inputs(typed, spoken)
     assert spoken.source.message_id is None
-    # The join-time name belongs to the joiner only; another uncached speaker never borrows it.
+    # The join-time name belongs to the joiner only; another uncached speaker never borrows it, and
+    # gets their cached user name (global name, no server nickname) rather than a bare id.
     other = runner._voice_input_source(adapter, 1, 43, channel.id).user_name
-    assert other == ("43" if case == "speaker-uncached" else "Alice")
+    assert other == ("Bob" if case == "speaker-uncached" else "Alice")
+    if case == "speaker-uncached":
+        assert runner._voice_input_source(adapter, 1, 44, channel.id).user_name == "44"  # cached nowhere
+        adapter._voice_sources = {}
+        assert runner._voice_input_source(adapter, 1, 43, channel.id).user_name == "Bob"  # no binding