diff --git a/d2m/actions/edit-message.js b/d2m/actions/edit-message.js
index d8c5f97..d52fcbd 100644
--- a/d2m/actions/edit-message.js
+++ b/d2m/actions/edit-message.js
@@ -24,7 +24,7 @@ async function editMessage(message, guild, row) {
 		if (row.speedbump_id === "466378653216014359") {
 			const root = await registerPkUser.fetchMessage(message.id)
 			assert(root.member)
-			senderMxid = await registerPkUser.ensureSimJoined(root.member, roomID)
+			senderMxid = await registerPkUser.ensureSimJoined(root, roomID)
 		}
 	}
 
diff --git a/d2m/actions/register-pk-user.js b/d2m/actions/register-pk-user.js
index f0fd492..da94f01 100644
--- a/d2m/actions/register-pk-user.js
+++ b/d2m/actions/register-pk-user.js
@@ -16,17 +16,17 @@ const registerUser = sync.require("./register-user")
 
 /**
  * A sim is an account that is being simulated by the bridge to copy events from the other side.
- * @param {Ty.PkMember} member
+ * @param {Ty.PkMessage} pkMessage
  * @returns mxid
  */
-async function createSim(member) {
+async function createSim(pkMessage) {
 	// Choose sim name
-	const simName = "_pk_" + member.id
+	const simName = "_pk_" + pkMessage.member.id
 	const localpart = reg.ooye.namespace_prefix + simName
 	const mxid = `@${localpart}:${reg.ooye.server_name}`
 
 	// Save chosen name in the database forever
-	db.prepare("INSERT INTO sim (user_id, sim_name, localpart, mxid) VALUES (?, ?, ?, ?)").run(member.uuid, simName, localpart, mxid)
+	db.prepare("INSERT INTO sim (user_id, sim_name, localpart, mxid) VALUES (?, ?, ?, ?)").run(pkMessage.member.uuid, simName, localpart, mxid)
 
 	// Register matrix user with that name
 	try {
@@ -34,7 +34,7 @@ async function createSim(member) {
 	} catch (e) {
 		// If user creation fails, manually undo the database change. Still isn't perfect, but should help.
 		// (I would prefer a transaction, but it's not safe to leave transactions open across event loop ticks.)
-		db.prepare("DELETE FROM sim WHERE user_id = ?").run(member.uuid)
+		db.prepare("DELETE FROM sim WHERE user_id = ?").run(pkMessage.member.uuid)
 		throw e
 	}
 	return mxid
@@ -43,32 +43,32 @@ async function createSim(member) {
 /**
  * Ensure a sim is registered for the user.
  * If there is already a sim, use that one. If there isn't one yet, register a new sim.
- * @param {Ty.PkMember} member
+ * @param {Ty.PkMessage} pkMessage
  * @returns {Promise<string>} mxid
  */
-async function ensureSim(member) {
+async function ensureSim(pkMessage) {
 	let mxid = null
-	const existing = select("sim", "mxid", {user_id: member.uuid}).pluck().get()
+	const existing = select("sim", "mxid", {user_id: pkMessage.member.uuid}).pluck().get()
 	if (existing) {
 		mxid = existing
 	} else {
-		mxid = await createSim(member)
+		mxid = await createSim(pkMessage)
 	}
 	return mxid
 }
 
 /**
  * Ensure a sim is registered for the user and is joined to the room.
- * @param {Ty.PkMember} member
+ * @param {Ty.PkMessage} pkMessage
  * @param {string} roomID
  * @returns {Promise<string>} mxid
  */
-async function ensureSimJoined(member, roomID) {
+async function ensureSimJoined(pkMessage, roomID) {
 	// Ensure room ID is really an ID, not an alias
 	assert.ok(roomID[0] === "!")
 
 	// Ensure user
-	const mxid = await ensureSim(member)
+	const mxid = await ensureSim(pkMessage)
 
 	// Ensure joined
 	const existing = select("sim_member", "mxid", {room_id: roomID, mxid}).pluck().get()
@@ -89,16 +89,17 @@ async function ensureSimJoined(member, roomID) {
 }
 
 /**
- * @param {Ty.PkMember} member
+ * @param {Ty.PkMessage} pkMessage
  */
-async function memberToStateContent(member) {
-	const displayname = member.display_name || member.name
-	const avatar = member.avatar_url || member.webhook_avatar_url
+async function memberToStateContent(pkMessage) {
+	const systemname = pkMessage.system.tag || ""
+	const displayname = (pkMessage.member.display_name || pkMessage.member.name) + systemname
+	const avatar = pkMessage.member.avatar_url || pkMessage.member.webhook_avatar_url || pkMessage.system.avatar_url
 
 	const content = {
 		displayname,
 		membership: "join",
-		"moe.cadence.ooye.pk_member": member
+		"moe.cadence.ooye.pk_member": pkMessage.member
 	}
 	if (avatar) content.avatar_url = await file.uploadDiscordFileToMxc(avatar)
 
@@ -111,12 +112,12 @@ async function memberToStateContent(member) {
  * 2. Make an object of what the new room member state content would be, including uploading the profile picture if it hasn't been done before
  * 3. Compare against the previously known state content, which is helpfully stored in the database
  * 4. If the state content has changed, send it to Matrix and update it in the database for next time
- * @param {Ty.PkMember} member
+ * @param {Ty.PkMessage} pkMessage
  * @returns {Promise<string>} mxid of the updated sim
  */
-async function syncUser(member, roomID) {
-	const mxid = await ensureSimJoined(member, roomID)
-	const content = await memberToStateContent(member)
+async function syncUser(pkMessage, roomID) {
+	const mxid = await ensureSimJoined(pkMessage, roomID)
+	const content = await memberToStateContent(pkMessage)
 	const currentHash = registerUser._hashProfileContent(content)
 	const existingHash = select("sim_member", "hashed_profile_content", {room_id: roomID, mxid}).safeIntegers().pluck().get()
 	// only do the actual sync if the hash has changed since we last looked
@@ -127,7 +128,7 @@ async function syncUser(member, roomID) {
 	return mxid
 }
 
-/** @returns {Promise<{member?: Ty.PkMember}>} */
+/** @returns {Promise<Ty.PkMessage>} */
 function fetchMessage(messageID) {
 	return fetch(`https://api.pluralkit.me/v2/messages/${messageID}`).then(res => res.json())
 }
diff --git a/d2m/actions/send-message.js b/d2m/actions/send-message.js
index 8d02c43..72011a1 100644
--- a/d2m/actions/send-message.js
+++ b/d2m/actions/send-message.js
@@ -36,8 +36,13 @@ async function sendMessage(message, guild, row) {
 		// Handle the PluralKit public instance
 		if (row.speedbump_id === "466378653216014359") {
 			const root = await registerPkUser.fetchMessage(message.id)
-			assert(root.member) // Member is null if member was deleted. We just got this message, so member surely exists.
-			senderMxid = await registerPkUser.syncUser(root.member, roomID)
+			// Member is null if member was deleted. We just got this message, so member surely exists.
+			if (!root.member) {
+				const e = new Error("PK API did not return a member")
+				e["response"] = root
+				throw e
+			}
+			senderMxid = await registerPkUser.syncUser(root, roomID)
 		}
 	}
 
diff --git a/types.d.ts b/types.d.ts
index daf62ad..a01241c 100644
--- a/types.d.ts
+++ b/types.d.ts
@@ -34,6 +34,19 @@ export type WebhookCreds = {
 	token: string
 }
 
+export type PkSystem = {
+	id: string
+	uuid: string
+	name: string | null
+	description: string | null
+	tag: string | null
+	pronouns: string | null
+	avatar_url: string | null
+	banner: string | null
+	color: string | null
+	created: string | null
+}
+
 export type PkMember = {
 	id: string
 	uuid: string
@@ -54,6 +67,11 @@ export type PkMember = {
 	last_message_timestamp: string
 }
 
+export type PkMessage = {
+	system: PkSystem
+	member: PkMember
+}
+
 export namespace Event {
 	export type Outer<T> = {
 		type: string