diff --git a/backend/src/plugins/Cases/functions/createCase.ts b/backend/src/plugins/Cases/functions/createCase.ts
index c16d937b..140ddce4 100644
--- a/backend/src/plugins/Cases/functions/createCase.ts
+++ b/backend/src/plugins/Cases/functions/createCase.ts
@@ -11,7 +11,7 @@ export async function createCase(pluginData: GuildPluginData<CasesPluginType>, a
   const userName = renderUserUsername(user);
 
   const mod = await resolveUser(pluginData.client, args.modId);
-  const modName = mod.tag;
+  const modName = renderUserUsername(mod);
 
   let ppName: string | null = null;
   let ppId: Snowflake | null = null;
diff --git a/backend/src/plugins/Cases/functions/createCaseNote.ts b/backend/src/plugins/Cases/functions/createCaseNote.ts
index 92520b7d..a699908c 100644
--- a/backend/src/plugins/Cases/functions/createCaseNote.ts
+++ b/backend/src/plugins/Cases/functions/createCaseNote.ts
@@ -1,6 +1,6 @@
 import { GuildPluginData } from "knub";
 import { ERRORS, RecoverablePluginError } from "../../../RecoverablePluginError";
-import { UnknownUser, resolveUser } from "../../../utils";
+import { UnknownUser, renderUserUsername, resolveUser } from "../../../utils";
 import { CaseNoteArgs, CasesPluginType } from "../types";
 import { postCaseToCaseLogChannel } from "./postToCaseLogChannel";
 import { resolveCaseId } from "./resolveCaseId";
@@ -16,7 +16,7 @@ export async function createCaseNote(pluginData: GuildPluginData<CasesPluginType
     throw new RecoverablePluginError(ERRORS.INVALID_USER);
   }
 
-  const modName = mod.tag;
+  const modName = renderUserUsername(mod);
 
   let body = args.body;
 
diff --git a/backend/src/plugins/InternalPoster/functions/sendMessage.ts b/backend/src/plugins/InternalPoster/functions/sendMessage.ts
index ec811240..3d4d6424 100644
--- a/backend/src/plugins/InternalPoster/functions/sendMessage.ts
+++ b/backend/src/plugins/InternalPoster/functions/sendMessage.ts
@@ -48,7 +48,7 @@ export async function sendMessage(
         ...content,
         ...(pluginData.client.user && {
           username: pluginData.client.user.username,
-          avatarURL: pluginData.client.user.avatarURL() || pluginData.client.user.defaultAvatarURL,
+          avatarURL: pluginData.client.user.displayAvatarURL(),
         }),
       })
       .then((apiMessage) => ({
diff --git a/backend/src/plugins/ModActions/commands/CasesModCmd.ts b/backend/src/plugins/ModActions/commands/CasesModCmd.ts
index 5b0e3273..faaad2d1 100644
--- a/backend/src/plugins/ModActions/commands/CasesModCmd.ts
+++ b/backend/src/plugins/ModActions/commands/CasesModCmd.ts
@@ -1,7 +1,7 @@
-import { APIEmbed, User } from "discord.js";
+import { APIEmbed, GuildMember, User } from "discord.js";
 import { commandTypeHelpers as ct } from "../../../commandTypes";
 import { sendErrorMessage } from "../../../pluginUtils";
-import { emptyEmbedValue, resolveUser, trimLines } from "../../../utils";
+import { emptyEmbedValue, renderUserUsername, resolveMember, resolveUser, trimLines } from "../../../utils";
 import { asyncMap } from "../../../utils/async";
 import { createPaginatedMessage } from "../../../utils/createPaginatedMessage";
 import { getChunkedEmbedFields } from "../../../utils/getChunkedEmbedFields";
@@ -28,8 +28,10 @@ export const CasesModCmd = modActionsCmd({
 
   async run({ pluginData, message: msg, args }) {
     const modId = args.mod || msg.author.id;
-    const mod = await resolveUser(pluginData.client, modId);
-    const modName = mod instanceof User ? mod.tag : modId;
+    const mod =
+      (await resolveMember(pluginData.client, pluginData.guild, modId)) ||
+      (await resolveUser(pluginData.client, modId));
+    const modName = mod instanceof User || mod instanceof GuildMember ? renderUserUsername(mod) : modId;
 
     const casesPlugin = pluginData.getPlugin(CasesPlugin);
     const totalCases = await casesPlugin.getTotalCasesByMod(modId);
@@ -57,7 +59,7 @@ export const CasesModCmd = modActionsCmd({
         const embed = {
           author: {
             name: title,
-            icon_url: mod instanceof User ? mod.displayAvatarURL() : undefined,
+            icon_url: mod instanceof GuildMember || mod instanceof User ? mod.displayAvatarURL() : undefined,
           },
           fields: [
             ...getChunkedEmbedFields(emptyEmbedValue, lines.join("\n")),
diff --git a/backend/src/plugins/ModActions/commands/CasesUserCmd.ts b/backend/src/plugins/ModActions/commands/CasesUserCmd.ts
index 069ad31f..3afc957a 100644
--- a/backend/src/plugins/ModActions/commands/CasesUserCmd.ts
+++ b/backend/src/plugins/ModActions/commands/CasesUserCmd.ts
@@ -1,9 +1,17 @@
-import { APIEmbed, User } from "discord.js";
+import { APIEmbed, GuildMember, User } from "discord.js";
 import { commandTypeHelpers as ct } from "../../../commandTypes";
 import { CaseTypes } from "../../../data/CaseTypes";
 import { sendErrorMessage } from "../../../pluginUtils";
 import { CasesPlugin } from "../../../plugins/Cases/CasesPlugin";
-import { UnknownUser, chunkArray, emptyEmbedValue, renderUserUsername, resolveUser, trimLines } from "../../../utils";
+import {
+  UnknownUser,
+  chunkArray,
+  emptyEmbedValue,
+  renderUserUsername,
+  resolveMember,
+  resolveUser,
+  trimLines,
+} from "../../../utils";
 import { asyncMap } from "../../../utils/async";
 import { getChunkedEmbedFields } from "../../../utils/getChunkedEmbedFields";
 import { getGuildPrefix } from "../../../utils/getGuildPrefix";
@@ -35,7 +43,9 @@ export const CasesUserCmd = modActionsCmd({
   ],
 
   async run({ pluginData, message: msg, args }) {
-    const user = await resolveUser(pluginData.client, args.user);
+    const user =
+      (await resolveMember(pluginData.client, pluginData.guild, args.user)) ||
+      (await resolveUser(pluginData.client, args.user));
     if (!user.id) {
       sendErrorMessage(pluginData, msg.channel, `User not found`);
       return;
@@ -123,7 +133,7 @@ export const CasesUserCmd = modActionsCmd({
                 lineChunks.length === 1
                   ? `Cases for ${userName} (${lines.length} total)`
                   : `Cases ${chunkStart}–${chunkEnd} of ${lines.length} for ${userName}`,
-              icon_url: user instanceof User ? user.displayAvatarURL() : undefined,
+              icon_url: user instanceof GuildMember || user instanceof User ? user.displayAvatarURL() : undefined,
             },
             fields: [
               ...getChunkedEmbedFields(emptyEmbedValue, linesInChunk.join("\n")),
diff --git a/backend/src/plugins/Starboard/util/createStarboardEmbedFromMessage.ts b/backend/src/plugins/Starboard/util/createStarboardEmbedFromMessage.ts
index 5f028c0a..d35e694f 100644
--- a/backend/src/plugins/Starboard/util/createStarboardEmbedFromMessage.ts
+++ b/backend/src/plugins/Starboard/util/createStarboardEmbedFromMessage.ts
@@ -1,6 +1,6 @@
 import { GuildChannel, Message } from "discord.js";
 import path from "path";
-import { EMPTY_CHAR, EmbedWith } from "../../../utils";
+import { EMPTY_CHAR, EmbedWith, renderUserUsername } from "../../../utils";
 
 const imageAttachmentExtensions = ["jpeg", "jpg", "png", "gif", "webp"];
 const audioAttachmentExtensions = ["wav", "mp3", "m4a"];
@@ -18,7 +18,7 @@ export function createStarboardEmbedFromMessage(
       text: `#${(msg.channel as GuildChannel).name}`,
     },
     author: {
-      name: msg.author.tag,
+      name: renderUserUsername(msg.author),
     },
     fields: [],
     timestamp: msg.createdAt.toISOString(),
@@ -28,7 +28,7 @@ export function createStarboardEmbedFromMessage(
     embed.color = color;
   }
 
-  embed.author.icon_url = msg.author.displayAvatarURL();
+  embed.author.icon_url = (msg.member || msg.author).displayAvatarURL();
 
   // The second condition here checks for messages with only an image link that is then embedded.
   // The message content in that case is hidden by the Discord client, so we hide it here too.
diff --git a/backend/src/plugins/Utility/commands/AvatarCmd.ts b/backend/src/plugins/Utility/commands/AvatarCmd.ts
index ef44a2cb..7323d829 100644
--- a/backend/src/plugins/Utility/commands/AvatarCmd.ts
+++ b/backend/src/plugins/Utility/commands/AvatarCmd.ts
@@ -10,11 +10,11 @@ export const AvatarCmd = utilityCmd({
   permission: "can_avatar",
 
   signature: {
-    user: ct.resolvedUserLoose({ required: false }),
+    user: ct.resolvedMember({ required: false }) || ct.resolvedUserLoose({ required: false }),
   },
 
   async run({ message: msg, args, pluginData }) {
-    const user = args.user || msg.author;
+    const user = args.user || msg.member || msg.author;
     if (!(user instanceof UnknownUser)) {
       const embed: APIEmbed = {
         image: {
diff --git a/backend/src/plugins/Utility/functions/getUserInfoEmbed.ts b/backend/src/plugins/Utility/functions/getUserInfoEmbed.ts
index ef8d2320..a8901dd1 100644
--- a/backend/src/plugins/Utility/functions/getUserInfoEmbed.ts
+++ b/backend/src/plugins/Utility/functions/getUserInfoEmbed.ts
@@ -46,7 +46,7 @@ export async function getUserInfoEmbed(
     name: `${user.bot ? "Bot" : "User"}:  ${renderUsername(user.username, user.discriminator)}`,
   };
 
-  const avatarURL = user.displayAvatarURL();
+  const avatarURL = (member || user).displayAvatarURL();
   embed.author.icon_url = avatarURL;
 
   if (compact) {
diff --git a/backend/src/plugins/Utility/search.ts b/backend/src/plugins/Utility/search.ts
index 19710b58..1be7d483 100644
--- a/backend/src/plugins/Utility/search.ts
+++ b/backend/src/plugins/Utility/search.ts
@@ -495,7 +495,7 @@ function formatSearchResultList(members: Array<GuildMember | User>): string {
       line = `${paddedId} ${renderUserUsername(member.user)}`;
       if (member.nickname) line += ` (${member.nickname})`;
     } else {
-      line = `${paddedId} ${member.tag}`;
+      line = `${paddedId} ${renderUserUsername(member)}`;
     }
     return line;
   });
diff --git a/backend/src/utils.ts b/backend/src/utils.ts
index 1bb4d6ce..ed7837f8 100644
--- a/backend/src/utils.ts
+++ b/backend/src/utils.ts
@@ -1610,6 +1610,7 @@ export function renderUsername(username: string, discriminator: string): string
   return `${username}#${discriminator}`;
 }
 
-export function renderUserUsername(user: User | UnknownUser): string {
+export function renderUserUsername(user: GuildMember | User | UnknownUser): string {
+  user instanceof GuildMember ? (user = user.user) : null;
   return renderUsername(user.username, user.discriminator);
 }
diff --git a/backend/src/utils/templateSafeObjects.ts b/backend/src/utils/templateSafeObjects.ts
index 67517f19..6c9b5e08 100644
--- a/backend/src/utils/templateSafeObjects.ts
+++ b/backend/src/utils/templateSafeObjects.ts
@@ -91,7 +91,7 @@ export class TemplateSafeMember extends TemplateSafeUser {
   nick: string;
   roles: TemplateSafeRole[];
   joinedAt?: number;
-  // guildAvatarURL: string, Once DJS supports per-server avatars
+  guildAvatarURL: string;
   guildName: string;
 
   constructor(data: InputProps<TemplateSafeMember>) {
@@ -259,7 +259,7 @@ export function userToTemplateSafeUser(user: User | UnknownUser): TemplateSafeUs
     discriminator: user.discriminator,
     mention: `<@${user.id}>`,
     tag: user.tag,
-    avatarURL: user.displayAvatarURL?.(),
+    avatarURL: user.displayAvatarURL(),
     bot: user.bot,
     createdAt: user.createdTimestamp,
     renderedUsername: renderUserUsername(user),
@@ -285,6 +285,7 @@ export function memberToTemplateSafeMember(member: GuildMember | PartialGuildMem
     nick: member.nickname ?? "*None*",
     roles: [...member.roles.cache.mapValues((r) => roleToTemplateSafeRole(r)).values()],
     joinedAt: member.joinedTimestamp ?? undefined,
+    guildAvatarURL: member.displayAvatarURL(),
     guildName: member.guild.name,
   });
 }