diff --git a/app/components/layout/ChatSidebar.tsx b/app/components/layout/ChatSidebar.tsx
index d4a1429f9..68feb5b8c 100644
--- a/app/components/layout/ChatSidebar.tsx
+++ b/app/components/layout/ChatSidebar.tsx
@@ -156,6 +156,17 @@ function ChatView({ onClose }: { onClose?: () => void }) {
 	const roomExpired = Boolean(room?.expiresAt && room.expiresAt < Date.now());
 	const messages = chatContext.messagesForRoom(activeRoom);
 
+	const participantIds = new Set(room?.participantUserIds ?? []);
+	const usersWithLabels = { ...chatContext.chatUsers };
+	for (const [userIdStr, label] of Object.entries(chatContext.chatLabels)) {
+		const userId = Number(userIdStr);
+		if (participantIds.has(userId)) continue;
+		const existing = usersWithLabels[userId];
+		if (existing) {
+			usersWithLabels[userId] = { ...existing, title: label };
+		}
+	}
+
 	const chatAdapter = {
 		messages,
 		send: (contents: string) => chatContext.send(activeRoom, contents),
@@ -229,7 +240,7 @@ function ChatView({ onClose }: { onClose?: () => void }) {
 			</div>
 			<div className={styles.chatContainer}>
 				<Chat
-					users={chatContext.chatUsers}
+					users={usersWithLabels}
 					rooms={[
 						{
 							label: room?.header ?? "Chat",
diff --git a/app/features/chat/ChatProvider.tsx b/app/features/chat/ChatProvider.tsx
index a95d6db2b..00688a2d2 100644
--- a/app/features/chat/ChatProvider.tsx
+++ b/app/features/chat/ChatProvider.tsx
@@ -136,6 +136,10 @@ function ChatProviderInner({
 	const [unreadCounts, setUnreadCounts] = React.useState<
 		Record<string, number>
 	>({});
+	const [chatLabels, setChatLabels] = React.useState<Record<number, string>>(
+		{},
+	);
+	const clearChatLabels = React.useCallback(() => setChatLabels({}), []);
 
 	const ws = React.useRef<WebSocket>(undefined);
 
@@ -508,6 +512,9 @@ function ChatProviderInner({
 			setChatOpen,
 			activeRoom,
 			setActiveRoom,
+			chatLabels,
+			setChatLabels,
+			clearChatLabels,
 		}),
 		[
 			isLoading,
@@ -525,6 +532,8 @@ function ChatProviderInner({
 			chatOpen,
 			activeRoom,
 			setChatOpen,
+			chatLabels,
+			clearChatLabels,
 		],
 	);
 
diff --git a/app/features/chat/chat-provider-types.ts b/app/features/chat/chat-provider-types.ts
index 59c3a5cd4..4d1162278 100644
--- a/app/features/chat/chat-provider-types.ts
+++ b/app/features/chat/chat-provider-types.ts
@@ -52,4 +52,7 @@ export interface ChatContextValue {
 	setChatOpen: (open: boolean) => void;
 	activeRoom: string | null;
 	setActiveRoom: (chatCode: string | null) => void;
+	chatLabels: Record<number, string>;
+	setChatLabels: (labels: Record<number, string>) => void;
+	clearChatLabels: () => void;
 }
diff --git a/app/features/tournament/routes/to.$id.tsx b/app/features/tournament/routes/to.$id.tsx
index 8441bbdd1..de987ccd1 100644
--- a/app/features/tournament/routes/to.$id.tsx
+++ b/app/features/tournament/routes/to.$id.tsx
@@ -12,6 +12,7 @@ import { Placeholder } from "~/components/Placeholder";
 import { SubNav, SubNavLink } from "~/components/SubNav";
 import { DANGEROUS_CAN_ACCESS_DEV_CONTROLS } from "~/features/admin/core/dev-controls";
 import { useUser } from "~/features/auth/core/user";
+import { useChatContext } from "~/features/chat/useChatContext";
 import { Tournament } from "~/features/tournament-bracket/core/Tournament";
 import { useIsMounted } from "~/hooks/useIsMounted";
 import type { SendouRouteHandle } from "~/utils/remix.server";
@@ -111,6 +112,8 @@ export function TournamentLayout() {
 	);
 	const [bracketExpanded, setBracketExpanded] = React.useState(true);
 
+	useTournamentChatLabels(tournament);
+
 	// this is nice to debug with tournament in browser console
 	if (process.env.NODE_ENV === "development") {
 		// biome-ignore lint/correctness/useHookAtTopLevel: process.env.NODE_ENV is a constant
@@ -240,3 +243,41 @@ export function useTournamentFriendCodes() {
 export function useTournamentPreparedMaps() {
 	return useOutletContext<TournamentContext>().preparedMaps;
 }
+
+function useTournamentChatLabels(tournament: Tournament) {
+	const chatContext = useChatContext();
+	const setChatLabels = chatContext?.setChatLabels;
+	const clearChatLabels = chatContext?.clearChatLabels;
+
+	React.useEffect(() => {
+		if (!setChatLabels || !clearChatLabels) return;
+
+		const labels: Record<number, string> = {};
+
+		labels[tournament.ctx.author.id] = "TO";
+
+		for (const staff of tournament.ctx.staff) {
+			if (staff.role === "ORGANIZER") {
+				labels[staff.id] = "TO";
+			} else if (staff.role === "STREAMER") {
+				labels[staff.id] = "Stream";
+			}
+		}
+
+		if (tournament.ctx.organization) {
+			for (const member of tournament.ctx.organization.members) {
+				if (["ADMIN", "ORGANIZER"].includes(member.role)) {
+					labels[member.userId] = "TO";
+				} else if (member.role === "STREAMER") {
+					labels[member.userId] = "Stream";
+				}
+			}
+		}
+
+		setChatLabels(labels);
+
+		return () => {
+			clearChatLabels();
+		};
+	}, [setChatLabels, clearChatLabels, tournament]);
+}