diff --git a/apps/web/src/chat/threads-api.test.ts b/apps/web/src/chat/threads-api.test.ts
index 4ace15ac0..da57207ab 100644
--- a/apps/web/src/chat/threads-api.test.ts
+++ b/apps/web/src/chat/threads-api.test.ts
@@ -2,7 +2,7 @@ import { describe, expect, test } from "bun:test";
 
 import { agentDeploySourceAssetName } from "../agent-deploy";
 import { MYRA_SOURCE_CONFIG } from "../myra-source";
-import { displayAgentName } from "./threads-api";
+import { displayAgentName, resolveAvatarName, type RoomParticipant } from "./threads-api";
 
 describe("displayAgentName", () => {
   test("renders Myra's fixed display name for her asset", () => {
@@ -18,3 +18,34 @@ describe("displayAgentName", () => {
     expect(displayAgentName("some-other-asset")).toBe("some-other-asset");
   });
 });
+
+describe("resolveAvatarName", () => {
+  const participants: readonly RoomParticipant[] = [
+    { id: "p1", kind: "person", name: "alice", address: "alice@example.com" },
+    { id: "a1", kind: "agent", name: "Myra", address: "myra@example.com" },
+  ];
+
+  test("uses the person's own real name for their own turn, never 'You'", () => {
+    const name = resolveAvatarName(
+      { author: "me", authorName: "You", address: "alice@example.com" },
+      participants,
+    );
+    expect(name).toBe("alice");
+  });
+
+  test("uses the matching participant's name for another author", () => {
+    const name = resolveAvatarName(
+      { author: "other", authorName: "myra", address: "myra@example.com" },
+      participants,
+    );
+    expect(name).toBe("Myra");
+  });
+
+  test("falls back to authorName when no participant matches", () => {
+    const name = resolveAvatarName(
+      { author: "other", authorName: "someone", address: "unknown@example.com" },
+      participants,
+    );
+    expect(name).toBe("someone");
+  });
+});
diff --git a/apps/web/src/chat/threads-api.ts b/apps/web/src/chat/threads-api.ts
index f18240dff..206a9574f 100644
--- a/apps/web/src/chat/threads-api.ts
+++ b/apps/web/src/chat/threads-api.ts
@@ -687,6 +687,18 @@ export function resolveParticipantName(
   );
 }
 
+/** A turn's avatar name: the matching participant's real name, including
+ * the person's own — never the "You" transcript label, which stays for the
+ * row's own text elsewhere. Falls back to `resolveParticipantName` when no
+ * participant matches the turn's address. */
+export function resolveAvatarName(
+  message: Pick<RoomMessage, "author" | "authorName" | "address">,
+  participants: readonly RoomParticipant[],
+): string {
+  const matched = participants.find((participant) => participant.address === message.address);
+  return matched?.name ?? resolveParticipantName(message, participants);
+}
+
 type RoomTurn = {
   readonly id: string;
   readonly messageId: string;
diff --git a/apps/web/src/pages/workbench-room-page.tsx b/apps/web/src/pages/workbench-room-page.tsx
index 6a4648da9..abbd8839a 100644
--- a/apps/web/src/pages/workbench-room-page.tsx
+++ b/apps/web/src/pages/workbench-room-page.tsx
@@ -29,6 +29,7 @@ import {
   ancestorChain,
   listRoomParticipants,
   readRoom,
+  resolveAvatarName,
   resolveParticipantName,
   sendToRoom,
   subscribeToInbox,
@@ -60,9 +61,10 @@ function RoomMessageRow({
   /** Undefined in the sub-thread panel, where a row is read-only context. */
   readonly onReply?: (message: RoomMessage) => void;
 }) {
-  // Avatars read off the participant's display name (Myra → "M"), never the
-  // run address local part a mail turn otherwise carries.
-  const displayName = resolveParticipantName(message, participants);
+  // Avatars read off the participant's real name — the person's own
+  // included, never the "You" transcript label — falling back to the
+  // address local part a mail turn otherwise carries.
+  const avatarName = resolveAvatarName(message, participants);
   const matched = participants.find((participant) => participant.address === message.address);
   const kind = message.author !== "me" && matched?.kind === "agent" ? "agent" : "person";
   // The person's own send carries a trailing roster block so agents in the
@@ -75,7 +77,7 @@ function RoomMessageRow({
       <span className="shell-ch-avatar">
         <IdentityAvatar
           kind={kind}
-          name={displayName}
+          name={avatarName}
           principalId={matched?.id ?? message.address}
         />
       </span>