diff --git a/app/Domain/Online/ViewerUser.php b/app/Domain/Online/ViewerUser.php
new file mode 100644
index 000000000..369020468
--- /dev/null
+++ b/app/Domain/Online/ViewerUser.php
@@ -0,0 +1,13 @@
+<?php
+namespace Coyote\Domain\Online;
+
+readonly class ViewerUser
+{
+    public function __construct(
+        public string  $name,
+        public ?string $groupName,
+        public ?string $avatarUrl,
+    )
+    {
+    }
+}
diff --git a/app/Domain/Online/Viewers.php b/app/Domain/Online/Viewers.php
new file mode 100644
index 000000000..d52658f1d
--- /dev/null
+++ b/app/Domain/Online/Viewers.php
@@ -0,0 +1,15 @@
+<?php
+namespace Coyote\Domain\Online;
+
+readonly class Viewers
+{
+    /**
+     * @param ViewerUser[] $users
+     */
+    public function __construct(
+        public array $users,
+        public int   $guestsCount,
+    )
+    {
+    }
+}
diff --git a/app/Domain/Online/ViewersStore.php b/app/Domain/Online/ViewersStore.php
new file mode 100644
index 000000000..ec6c5722b
--- /dev/null
+++ b/app/Domain/Online/ViewersStore.php
@@ -0,0 +1,31 @@
+<?php
+namespace Coyote\Domain\Online;
+
+use Coyote\User;
+
+class ViewersStore
+{
+    public function viewers(SessionsSnapshot $sessions): Viewers
+    {
+        return new Viewers(
+            $this->mapToViewerUsers($sessions),
+            $sessions->guestsCount,
+        );
+    }
+
+    private function mapToViewerUsers(SessionsSnapshot $sessions): array
+    {
+        return User::query()->findMany($sessions->users)
+            ->map($this->viewerUser(...))
+            ->toArray();
+    }
+
+    private function viewerUser(User $user): ViewerUser
+    {
+        return new ViewerUser(
+            $user->name,
+            $user->group_name,
+            $user->photo->getFilename(),
+        );
+    }
+}
diff --git a/tests/Unit/BaseFixture/Forum/ModelsDsl.php b/tests/Unit/BaseFixture/Forum/ModelsDsl.php
index accdab45c..483fba54a 100644
--- a/tests/Unit/BaseFixture/Forum/ModelsDsl.php
+++ b/tests/Unit/BaseFixture/Forum/ModelsDsl.php
@@ -25,12 +25,21 @@ public function newUserDeleted(string $name): void
         $this->newUser(name:$name, deleted:true);
     }
 
-    public function newUserReturnId(string $name = null, string $permissionName = null): int
-    {
-        $user = $this->models->newUserReturn(name:$name);
+    public function newUserReturnId(
+        string $name = null,
+        string $permissionName = null,
+        string $groupName = null,
+        string $photoUrl = null,
+        bool   $deleted = false,
+    ): int
+    {
+        $user = $this->models->newUserReturn(name:$name, photoUrl:$photoUrl, deleted:$deleted);
         if ($permissionName) {
             $this->models->assignToGroupWithPermission($user, $permissionName);
         }
+        if ($groupName) {
+            $this->models->assignToGroupWithNameReturnId($user, $groupName);
+        }
         return $user->id;
     }
 
diff --git a/tests/Unit/BaseFixture/Forum/ModelsDslTest.php b/tests/Unit/BaseFixture/Forum/ModelsDslTest.php
index 1ba46f577..9b38ef00a 100644
--- a/tests/Unit/BaseFixture/Forum/ModelsDslTest.php
+++ b/tests/Unit/BaseFixture/Forum/ModelsDslTest.php
@@ -283,6 +283,23 @@ public function newUserWithPermissionNoOther(): void
         $this->assertUserCan(false, $userId, 'forum-delete');
     }
 
+    #[Test]
+    public function newUserWithGroupName(): void
+    {
+        $userId = $this->models->newUserReturnId(groupName:'Writer');
+        $this->assertDatabaseHas('users', [
+            'id'         => $userId,
+            'group_name' => 'Writer',
+        ]);
+    }
+
+    #[Test]
+    public function newUserWithAvatar(): void
+    {
+        $userId = $this->models->newUserReturnId(photoUrl:'image.png');
+        $this->assertStringEndsWith('/image.png', (string)User::query()->findOrFail($userId)->photo->url());
+    }
+
     private function assertUserCan(bool $expected, int $userId, string $permission): void
     {
         /** @var User $user */
diff --git a/tests/Unit/BaseFixture/Forum/ModelsFactory.php b/tests/Unit/BaseFixture/Forum/ModelsFactory.php
index 1ec30406f..b4262f895 100644
--- a/tests/Unit/BaseFixture/Forum/ModelsFactory.php
+++ b/tests/Unit/BaseFixture/Forum/ModelsFactory.php
@@ -52,6 +52,19 @@ private function groupWithPermission(string $permissionName): Group
         return $group;
     }
 
+    public function assignToGroupWithNameReturnId(User $user, string $groupName): void
+    {
+        $groupId = $this->groupWithName($groupName)->id;
+        $user->groups()->sync([$groupId]);
+        $user->group_id = $groupId;
+        $user->save();
+    }
+
+    private function groupWithName(string $groupName): Group
+    {
+        return Group::query()->create(['name' => $groupName]);
+    }
+
     public function newPostReturn(
         string $content = null,
         Carbon $createdAt = null,
diff --git a/tests/Unit/OnlineUsers/ViewersStoreTest.php b/tests/Unit/OnlineUsers/ViewersStoreTest.php
new file mode 100644
index 000000000..921ffda3a
--- /dev/null
+++ b/tests/Unit/OnlineUsers/ViewersStoreTest.php
@@ -0,0 +1,86 @@
+<?php
+namespace Tests\Unit\OnlineUsers;
+
+use Coyote\Domain\Online\SessionsSnapshot;
+use Coyote\Domain\Online\ViewersStore;
+use Coyote\Domain\Online\ViewerUser;
+use PHPUnit\Framework\Attributes\Before;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+use Tests\Unit\BaseFixture\Forum\Models;
+
+class ViewersStoreTest extends TestCase
+{
+    use Models;
+
+    private ViewersStore $store;
+
+    #[Before]
+    public function initialize(): void
+    {
+        $this->store = new ViewersStore();
+    }
+
+    #[Test]
+    public function remainsGuestsCount(): void
+    {
+        $viewer = $this->store->viewers($this->guests(99));
+        $this->assertSame(99, $viewer->guestsCount);
+    }
+
+    #[Test]
+    public function viewerHasUserName(): void
+    {
+        $id = $this->models->newUserReturnId('Mark');
+        $this->assertSame('Mark', $this->viewer($id)->name);
+    }
+
+    #[Test]
+    public function viewerHasUserGroupName(): void
+    {
+        $id = $this->models->newUserReturnId(groupName:'Admin');
+        $this->assertSame('Admin', $this->viewer($id)->groupName);
+    }
+
+    #[Test]
+    public function viewerHasUserAvatar(): void
+    {
+        $id = $this->models->newUserReturnId(photoUrl:'image.png');
+        $this->assertSame('image.png', $this->viewer($id)->avatarUrl);
+    }
+
+    #[Test]
+    public function forUserWithoutGroup_viewerHasGroupNameNull(): void
+    {
+        $id = $this->models->newUserReturnId();
+        $this->assertNull($this->viewer($id)->groupName);
+    }
+
+    #[Test]
+    public function deletedUsers_areNotIncluded(): void
+    {
+        $id = $this->models->newUserReturnId(deleted:true);
+        $this->assertEmpty($this->viewers($id));
+    }
+
+    private function guests(int $guestsCount): SessionsSnapshot
+    {
+        return new SessionsSnapshot([], $guestsCount);
+    }
+
+    private function users(array $users): SessionsSnapshot
+    {
+        return new SessionsSnapshot($users, 0);
+    }
+
+    private function viewer(int $id): ViewerUser
+    {
+        return $this->viewers($id)[0];
+    }
+
+    private function viewers(int $id): array
+    {
+        $viewer = $this->store->viewers($this->users([$id]));
+        return $viewer->users;
+    }
+}