diff --git a/src/components/general/chatroom-stone-cluster.tsx b/src/components/general/chatroom-stone-cluster.tsx
new file mode 100644
index 0000000..6e95bee
--- /dev/null
+++ b/src/components/general/chatroom-stone-cluster.tsx
@@ -0,0 +1,48 @@
+import Row from "@moduletrace/twui/layout/Row";
+import Stack from "@moduletrace/twui/layout/Stack";
+import type { ChatroomBot } from "@/src/types";
+import ChatroomStone from "./chatroom-stone";
+
+type Props = {
+    bots: ChatroomBot[];
+};
+
+/**
+ * The square the cluster fills (`w-7 h-7`), the size of a rail avatar.
+ */
+const ClusterSize = 28;
+
+/**
+ * A chatroom's bots packed into one avatar-sized square: the asking bot
+ * on top, the two below it in a triangle (four make a square, the rest
+ * are left out). Stones stay small and apart: never overlapping, in a
+ * badge or outlined. One bot fills the square alone.
+ */
+export default function ChatroomStoneCluster({ bots }: Props) {
+    const shown = bots.slice(0, 4);
+    const stone = Math.floor((ClusterSize - 2) / 2);
+
+    if (shown.length <= 1) {
+        return shown[0] ? <ChatroomStone bot={shown[0]} size={ClusterSize} /> : null;
+    }
+
+    const top = shown.length == 3 ? shown.slice(0, 1) : shown.slice(0, 2);
+    const bottom = shown.length == 2 ? [] : shown.slice(top.length);
+
+    return (
+        <Stack className="shrink-0 gap-0.5! items-center justify-center w-7 h-7">
+            <Row className="gap-0.5! flex-nowrap justify-center">
+                {top.map((bot) => (
+                    <ChatroomStone key={bot.id} bot={bot} size={stone} />
+                ))}
+            </Row>
+            {bottom.length ? (
+                <Row className="gap-0.5! flex-nowrap justify-center">
+                    {bottom.map((bot) => (
+                        <ChatroomStone key={bot.id} bot={bot} size={stone} />
+                    ))}
+                </Row>
+            ) : null}
+        </Stack>
+    );
+}
diff --git a/src/layouts/bots/(partials)/rail-chatroom-row.tsx b/src/layouts/bots/(partials)/rail-chatroom-row.tsx
index 65e6e08..26e07aa 100644
--- a/src/layouts/bots/(partials)/rail-chatroom-row.tsx
+++ b/src/layouts/bots/(partials)/rail-chatroom-row.tsx
@@ -2,7 +2,7 @@ import Link from "@moduletrace/twui/layout/Link";
 import Span from "@moduletrace/twui/layout/Span";
 import Stack from "@moduletrace/twui/layout/Stack";
 import { twMerge } from "tailwind-merge";
-import ChatroomStone from "@/src/components/general/chatroom-stone";
+import ChatroomStoneCluster from "@/src/components/general/chatroom-stone-cluster";
 import type { ChatroomSummary } from "@/src/types";
 import chatroomStatusLine from "@/src/utils/chatroom-status-line";
 
@@ -13,12 +13,11 @@ type Props = {
 };
 
 /**
- * A chatroom in the rail, the same 48px row as a bot: the asking bot's
- * stone, the request and where it stands. Unread is said in words.
+ * A chatroom in the rail, the same 48px row as a bot: its bots' stones
+ * in one avatar-sized cluster, the request and where it stands. Unread
+ * is said in words.
  */
 export default function RailChatroomRow({ chatroom, href, selected }: Props) {
-    const requester = chatroom.bots[0];
-
     return (
         <Link
             href={href}
@@ -32,7 +31,7 @@ export default function RailChatroomRow({ chatroom, href, selected }: Props) {
             )}
         >
             <Span className="mx-auto @rail:mx-0 inline-flex shrink-0">
-                {requester ? <ChatroomStone bot={requester} size={28} /> : null}
+                <ChatroomStoneCluster bots={chatroom.bots} />
             </Span>
             <Stack className="hidden @rail:flex grow min-w-0 gap-0!">
                 <Span className="text-sm font-bold leading-5 text-ink truncate w-full">