diff --git a/src/client/websocket/handlers/CHANNEL_RECIPIENT_ADD.js b/src/client/websocket/handlers/CHANNEL_RECIPIENT_ADD.js
new file mode 100644
index 00000000..aa9fca0
--- /dev/null
+++ b/src/client/websocket/handlers/CHANNEL_RECIPIENT_ADD.js
@@ -0,0 +1,15 @@
+'use strict';
+const { Events } = require('../../../util/Constants');
+module.exports = (client, packet) => {
+  /**
+   * Emitted whenever a recipient is added from a group DM.
+   * @event Client#channelRecipientAdd
+   * @param {PartialGroupDMChannel} channel Group DM channel
+   * @param {User} user User
+   */
+  const channel = client.channels.cache.get(packet.d.channel_id);
+  if (!channel) return;
+  channel._recipients = channel._recipients.push(packet.d.user);
+  const user = client.users._add(packet.d.user);
+  client.emit(Events.CHANNEL_RECIPIENT_ADD, channel, user);
+};
diff --git a/src/client/websocket/handlers/CHANNEL_RECIPIENT_REMOVE.js b/src/client/websocket/handlers/CHANNEL_RECIPIENT_REMOVE.js
new file mode 100644
index 00000000..6ba821c
--- /dev/null
+++ b/src/client/websocket/handlers/CHANNEL_RECIPIENT_REMOVE.js
@@ -0,0 +1,15 @@
+'use strict';
+const { Events } = require('../../../util/Constants');
+module.exports = (client, packet) => {
+  /**
+   * Emitted whenever a recipient is removed from a group DM.
+   * @event Client#channelRecipientRemove
+   * @param {PartialGroupDMChannel} channel Group DM channel
+   * @param {User} user User
+   */
+  const channel = client.channels.cache.get(packet.d.channel_id);
+  if (!channel) return;
+  channel._recipients = channel._recipients.filter(r => r !== packet.d.user.id);
+  const user = client.users._add(packet.d.user);
+  client.emit(Events.CHANNEL_RECIPIENT_REMOVE, channel, user);
+};
diff --git a/src/client/websocket/handlers/RELATIONSHIP_REMOVE.js b/src/client/websocket/handlers/RELATIONSHIP_REMOVE.js
index 3c6b405..cb613c5 100644
--- a/src/client/websocket/handlers/RELATIONSHIP_REMOVE.js
+++ b/src/client/websocket/handlers/RELATIONSHIP_REMOVE.js
@@ -4,6 +4,7 @@ const { Events, RelationshipTypes } = require('../../../util/Constants');
 
 module.exports = (client, { d: data }) => {
   client.relationships.cache.delete(data.id);
+  client.user.friendNicknames.delete(data.id);
   /**
    * Emitted whenever a relationship is delete.
    * @event Client#relationshipRemove
diff --git a/src/client/websocket/handlers/RELATIONSHIP_UPDATE.js b/src/client/websocket/handlers/RELATIONSHIP_UPDATE.js
new file mode 100644
index 00000000..6fa196d
--- /dev/null
+++ b/src/client/websocket/handlers/RELATIONSHIP_UPDATE.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const { Events, RelationshipTypes } = require('../../../util/Constants');
+
+module.exports = (client, { d: data }) => {
+  client.relationships.cache.set(data.id, data.type);
+  /**
+   * Emitted whenever a relationship is updated.
+   * @event Client#relationshipUpdate
+   * @param {Snowflake} user The userID that was updated
+   * @param {RelationshipTypes} type The new relationship type
+   * @param {Object} data The raw data
+   */
+  if ('nickname' in data) {
+    client.user.friendNicknames.set(data.id, data.nickname);
+  }
+  client.emit(Events.RELATIONSHIP_UPDATE, data.id, RelationshipTypes[data.type], data);
+};
diff --git a/src/client/websocket/handlers/index.js b/src/client/websocket/handlers/index.js
index a44d719..d5d8ac5 100644
--- a/src/client/websocket/handlers/index.js
+++ b/src/client/websocket/handlers/index.js
@@ -5,6 +5,7 @@ const handlers = Object.fromEntries([
   ['RESUMED', require('./RESUMED')],
   ['RELATIONSHIP_ADD', require('./RELATIONSHIP_ADD')],
   ['RELATIONSHIP_REMOVE', require('./RELATIONSHIP_REMOVE')],
+  ['RELATIONSHIP_UPDATE', require('./RELATIONSHIP_UPDATE')],
   ['APPLICATION_COMMAND_AUTOCOMPLETE_RESPONSE', require('./APPLICATION_COMMAND_AUTOCOMPLETE_RESPONSE')],
   ['APPLICATION_COMMAND_CREATE', require('./APPLICATION_COMMAND_CREATE')],
   ['APPLICATION_COMMAND_DELETE', require('./APPLICATION_COMMAND_DELETE')],
@@ -34,6 +35,8 @@ const handlers = Object.fromEntries([
   ['CHANNEL_DELETE', require('./CHANNEL_DELETE')],
   ['CHANNEL_UPDATE', require('./CHANNEL_UPDATE')],
   ['CHANNEL_PINS_UPDATE', require('./CHANNEL_PINS_UPDATE')],
+  ['CHANNEL_RECIPIENT_ADD', require('./CHANNEL_RECIPIENT_ADD')],
+  ['CHANNEL_RECIPIENT_REMOVE', require('./CHANNEL_RECIPIENT_REMOVE')],
   ['MESSAGE_ACK', require('./MESSAGE_ACK')],
   ['MESSAGE_CREATE', require('./MESSAGE_CREATE')],
   ['MESSAGE_DELETE', require('./MESSAGE_DELETE')],
diff --git a/src/managers/RelationshipManager.js b/src/managers/RelationshipManager.js
index adcb604..01ebab5 100644
--- a/src/managers/RelationshipManager.js
+++ b/src/managers/RelationshipManager.js
@@ -91,6 +91,7 @@ class RelationshipManager {
   _setup(users) {
     if (!Array.isArray(users)) return;
     for (const relationShip of users) {
+      this.client.user.friendNicknames.set(relationShip.id, relationShip.nickname);
       this.cache.set(relationShip.id, relationShip.type);
     }
   }
@@ -211,6 +212,23 @@ class RelationshipManager {
     return true;
   }
 
+  /**
+   * Changes the nickname of a friend.
+   * @param {UserResolvable} user The user to change the nickname
+   * @param {?string} nickname New nickname
+   * @returns {Promise<boolean>}
+   */
+  async setNickname(user, nickname) {
+    const id = this.resolveId(user);
+    if (this.cache.get(id) !== RelationshipTypes.FRIEND) return false;
+    await this.client.api.users['@me'].relationships[id].patch({
+      data: {
+        nickname: typeof nickname === 'string' ? nickname : null,
+      },
+    });
+    return true;
+  }
+
   /**
    * Blocks a user.
    * @param {UserResolvable} user User to block
diff --git a/src/structures/ClientApplication.js b/src/structures/ClientApplication.js
index d4cb84b..0d63011 100644
--- a/src/structures/ClientApplication.js
+++ b/src/structures/ClientApplication.js
@@ -115,7 +115,7 @@ class ClientApplication extends Application {
        */
       this.popularCommands = new Collection();
       data.popular_application_command_ids.forEach(id => {
-        this.popularCommands.set(id, this.commands.cache.get(id));
+        this.popularCommands.set(id, this.commands?.cache?.get(id));
       });
     }
 
@@ -147,10 +147,11 @@ class ClientApplication extends Application {
     const app = await this.client.api.oauth2.authorize.get({
       query: {
         client_id: this.id,
-        scope: 'bot',
+        scope: 'bot applications.commands',
       },
     });
-    this.client.users._add(app.bot);
+    const user = this.client.users._add(app.bot);
+    user._partial = false;
     this._patch(app.application);
     return this;
   }
diff --git a/src/structures/ClientUser.js b/src/structures/ClientUser.js
index 7427dfc..5020821 100644
--- a/src/structures/ClientUser.js
+++ b/src/structures/ClientUser.js
@@ -77,6 +77,13 @@ class ClientUser extends User {
     if ('bio' in data) {
       this.bio = data.bio;
     }
+
+    /**
+     * The friend nicknames cache of the client user.
+     * @type {Collection<Snowflake, string>}
+     * @private
+     */
+    this.friendNicknames = new Collection();
   }
 
   /**
diff --git a/src/structures/PartialGroupDMChannel.js b/src/structures/PartialGroupDMChannel.js
index 59a63cf..42d666b 100644
--- a/src/structures/PartialGroupDMChannel.js
+++ b/src/structures/PartialGroupDMChannel.js
@@ -29,12 +29,6 @@ class PartialGroupDMChannel extends Channel {
      */
     this.icon = null;
 
-    /**
-     * The recipients of this Group DM Channel.
-     * @type {Collection<Snowflake, User>}
-     */
-    this.recipients = null;
-
     /**
      * Messages data
      * @type {Collection}
@@ -68,6 +62,18 @@ class PartialGroupDMChannel extends Channel {
     this._patch(data);
   }
 
+  /**
+   * The recipients of this Group DM Channel.
+   * @type {Collection<Snowflake, User>}
+   * @readonly
+   */
+  get recipients() {
+    const collect = new Collection();
+    this._recipients.map(recipient => collect.set(recipient.id, this.client.users._add(recipient)));
+    collect.set(this.client.user.id, this.client.user);
+    return collect;
+  }
+
   /**
    * The owner of this Group DM Channel
    * @type {?User}
@@ -85,8 +91,7 @@ class PartialGroupDMChannel extends Channel {
   _patch(data) {
     super._patch(data);
     if ('recipients' in data) {
-      this.recipients = new Collection();
-      data.recipients.map(recipient => this.recipients.set(recipient.id, this.client.users._add(recipient)));
+      this._recipients = data.recipients;
     }
     if ('last_pin_timestamp' in data) {
       const date = new Date(data.last_pin_timestamp);
diff --git a/src/structures/User.js b/src/structures/User.js
index b1c1f1d..7e7e715 100644
--- a/src/structures/User.js
+++ b/src/structures/User.js
@@ -196,6 +196,15 @@ class User extends Base {
     return this.client.user.notes.get(this.id);
   }
 
+  /**
+   * Get friend nickname
+   * @type {?string}
+   * @readonly
+   */
+  get nickname() {
+    return this.client.user.friendNicknames.get(this.id);
+  }
+
   /**
    * The voice state of this member
    * @type {VoiceState}
@@ -282,6 +291,16 @@ class User extends Base {
     return this.client.relationships.addFriend(this);
   }
 
+  /**
+   * Changes the nickname of the friend
+   * @param {?string} nickname The nickname to change
+   * @type {boolean}
+   * @returns {Promise<boolean>}
+   */
+  setNickname(nickname) {
+    return this.client.user.setNickname(this.id, nickname);
+  }
+
   /**
    * Send Friend Request to the user
    * @type {boolean}
diff --git a/src/util/Constants.js b/src/util/Constants.js
index f686c4f..77a8166 100644
--- a/src/util/Constants.js
+++ b/src/util/Constants.js
@@ -358,6 +358,8 @@ exports.Opcodes = {
  * * CHANNEL_DELETE: channelDelete
  * * CHANNEL_UPDATE: channelUpdate
  * * CHANNEL_PINS_UPDATE: channelPinsUpdate
+ * * CHANNEL_RECIPIENT_REMOVE: channelRecipientRemove
+ * * CHANNEL_RECIPIENT_ADD: channelRecipientAdd
  * * MESSAGE_ACK: messageAck
  * * MESSAGE_CREATE: messageCreate
  * * MESSAGE_DELETE: messageDelete
@@ -443,6 +445,8 @@ exports.Events = {
   CHANNEL_DELETE: 'channelDelete',
   CHANNEL_UPDATE: 'channelUpdate',
   CHANNEL_PINS_UPDATE: 'channelPinsUpdate',
+  CHANNEL_RECIPIENT_REMOVE: 'channelRecipientRemove',
+  CHANNEL_RECIPIENT_ADD: 'channelRecipientAdd',
   MESSAGE_ACK: 'messageAck',
   MESSAGE_CREATE: 'messageCreate',
   MESSAGE_DELETE: 'messageDelete',
@@ -493,6 +497,7 @@ exports.Events = {
   GUILD_SCHEDULED_EVENT_USER_REMOVE: 'guildScheduledEventUserRemove',
   RELATIONSHIP_ADD: 'relationshipAdd',
   RELATIONSHIP_REMOVE: 'relationshipRemove',
+  RELATIONSHIP_UPDATE: 'relationshipUpdate',
   UNHANDLED_PACKET: 'unhandledPacket',
 };
 
diff --git a/typings/index.d.ts b/typings/index.d.ts
index d9d8090..7129673 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -924,6 +924,8 @@ export class ClientUser extends User {
   public mfaEnabled: boolean;
   public readonly presence: ClientPresence;
   public verified: boolean;
+  public notes: Collection<Snowflake, string>;
+  public friendNicknames: Collection<Snowflake, string>;
   public edit(data: ClientUserEditData): Promise<this>;
   public setActivity(options?: ActivityOptions): ClientPresence;
   public setActivity(name: string, options?: ActivityOptions): ClientPresence;
@@ -2347,7 +2349,7 @@ export class PartialGroupDMChannel extends TextBasedChannelMixin(Channel, [
   private constructor(client: Client, data: RawPartialGroupDMChannelData);
   public name: string | null;
   public icon: string | null;
-  public recipients: Collection<Snowflake, User>;
+  public readonly recipients: Collection<Snowflake, User>;
   public messages: MessageManager;
   public invites: Collection<string, Invite>;
   public lastMessageId: Snowflake | null;
@@ -2964,6 +2966,7 @@ export class User extends PartialTextBasedChannel(Base) {
   public readonly tag: string;
   public username: string;
   public readonly note: string | null;
+  public readonly nickname: string | null;
   public readonly connectedAccounts: object[];
   public readonly premiumSince: Date;
   public readonly premiumGuildSince: Date;
@@ -2985,6 +2988,7 @@ export class User extends PartialTextBasedChannel(Base) {
   public unBlock(): Promise<User>;
   public setNote(note?: any): Promise<string>;
   public getProfile(guildId?: Snowflake): Promise<User>;
+  public setNickname(nickname: string | null): Promise<boolean>;
   public toString(): UserMention;
   public ring(): Promise<boolean>;
 }
@@ -4014,6 +4018,7 @@ export class RelationshipManager {
   public cancelFriendRequest(user: UserResolvable): Promise<boolean>;
   public addFriend(user: UserResolvable): Promise<boolean>;
   public addBlocked(user: UserResolvable): Promise<boolean>;
+  public setNickname(user: UserResolvable, nickname: string|null): Promise<boolean>;
   private __cancel(id: Snowflake): Promise<boolean>;
 }
 
@@ -4332,6 +4337,8 @@ export interface ClientEvents extends BaseClientEvents {
   channelCreate: [channel: NonThreadGuildBasedChannel];
   channelDelete: [channel: DMChannel | NonThreadGuildBasedChannel];
   channelPinsUpdate: [channel: TextBasedChannel, date: Date];
+  channelRecipientAdd: [channel: PartialGroupDMChannel, user: User];
+  channelRecipientRemove: [channel: PartialGroupDMChannel, user: User];
   channelUpdate: [
     oldChannel: DMChannel | NonThreadGuildBasedChannel,
     newChannel: DMChannel | NonThreadGuildBasedChannel,
@@ -4425,6 +4432,7 @@ export interface ClientEvents extends BaseClientEvents {
   guildScheduledEventUserRemove: [guildScheduledEvent: GuildScheduledEvent, user: User];
   relationshipAdd: [id: Snowflake, type: RelationshipTypes];
   relationshipRemove: [id: Snowflake];
+  relationshipUpdate: [id: Snowflake, type: RelationshipTypes, data: object];
   unhandledPacket: [packet: { op: GatewayOpcodes | number; d?: any; s?: number; t?: string }, shard: WebSocketShard];
   update: [oldVersion: string, newVersion: string];
 }
@@ -4470,6 +4478,8 @@ export interface ConstantsEvents {
   CHANNEL_DELETE: 'channelDelete';
   CHANNEL_UPDATE: 'channelUpdate';
   CHANNEL_PINS_UPDATE: 'channelPinsUpdate';
+  CHANNEL_RECIPIENT_ADD: 'channelRecipientAdd';
+  CHANNEL_RECIPIENT_REMOVE: 'channelRecipientRemove';
   MESSAGE_ACK: 'messageAck';
   MESSAGE_CREATE: 'messageCreate';
   MESSAGE_DELETE: 'messageDelete';
@@ -4520,6 +4530,7 @@ export interface ConstantsEvents {
   GUILD_SCHEDULED_EVENT_USER_REMOVE: 'guildScheduledEventUserRemove';
   RELATIONSHIP_ADD: 'relationshipAdd';
   RELATIONSHIP_REMOVE: 'relationshipRemove';
+  RELATIONSHIP_UPDATE: 'relationshipUpdate';
   UNHANDLED_PACKET: 'unhandledPacket';
 }