diff --git a/lib/nulla/models/actor.ex b/lib/nulla/models/actor.ex
index 8db516e..f1c58a1 100644
--- a/lib/nulla/models/actor.ex
+++ b/lib/nulla/models/actor.ex
@@ -25,12 +25,12 @@ defmodule Nulla.Models.Actor do
     field :indexable, :boolean, default: true
     field :published, :utc_datetime
     field :memorial, :boolean, default: false
-    field :publicKey, {:array, :map}
-    field :tag, {:array, :map}
-    field :attachment, {:array, :map}
+    field :publicKey, :map
+    field :tag, {:array, :map}, default: []
+    field :attachment, {:array, :map}, default: []
     field :endpoints, :map
-    field :icon, :map
-    field :image, :map
+    field :icon, :map, default: %{}
+    field :image, :map, default: %{}
     field :vcard_bday, :date
     field :vcard_Address, :string
 
@@ -71,7 +71,6 @@ defmodule Nulla.Models.Actor do
       :vcard_Address
     ])
     |> validate_required([
-      :id,
       :domain,
       :ap_id,
       :type,
@@ -82,8 +81,6 @@ defmodule Nulla.Models.Actor do
       :featured,
       :featuredTags,
       :preferredUsername,
-      :name,
-      :summary,
       :url,
       :manuallyApprovesFollowers,
       :discoverable,
@@ -91,13 +88,7 @@ defmodule Nulla.Models.Actor do
       :published,
       :memorial,
       :publicKey,
-      :tag,
-      :attachment,
-      :endpoints,
-      :icon,
-      :image,
-      :vcard_bday,
-      :vcard_Address
+      :endpoints
     ])
   end
 
diff --git a/priv/repo/migrations/20250615130714_create_actors.exs b/priv/repo/migrations/20250615130714_create_actors.exs
index d94ca47..da2ff37 100644
--- a/priv/repo/migrations/20250615130714_create_actors.exs
+++ b/priv/repo/migrations/20250615130714_create_actors.exs
@@ -23,11 +23,11 @@ defmodule Nulla.Repo.Migrations.CreateActors do
       add :published, :utc_datetime
       add :memorial, :boolean, default: false
       add :publicKey, :map
-      add :tag, {:array, :map}
-      add :attachment, {:array, :map}
+      add :tag, {:array, :map}, default: []
+      add :attachment, {:array, :map}, default: []
       add :endpoints, :map
-      add :icon, :map
-      add :image, :map
+      add :icon, :map, default: %{}
+      add :image, :map, default: %{}
       add :vcard_bday, :date
       add :vcard_Address, :string
     end
diff --git a/test/nulla_web/controllers/actor_controller_test.exs b/test/nulla_web/controllers/actor_controller_test.exs
new file mode 100644
index 0000000..01cc610
--- /dev/null
+++ b/test/nulla_web/controllers/actor_controller_test.exs
@@ -0,0 +1,88 @@
+defmodule NullaWeb.ActorControllerTest do
+  use NullaWeb.ConnCase
+  alias Nulla.Models.Actor
+
+  setup do
+    Actor.create_actor(%{
+      domain: "localhost",
+      ap_id: "http://localhost/users/test",
+      type: "Person",
+      following: "http://localhost/users/test/following",
+      followers: "http://localhost/users/test/followers",
+      inbox: "http://localhost/users/test/inbox",
+      outbox: "http://localhost/users/test/outbox",
+      featured: "http://localhost/users/test/collections/featured",
+      featuredTags: "http://localhost/users/test/collections/tags",
+      preferredUsername: "test",
+      name: "Test",
+      summary: "Test User",
+      url: "http://localhost/@test",
+      manuallyApprovesFollowers: false,
+      discoverable: true,
+      indexable: true,
+      published: DateTime.utc_now(),
+      memorial: false,
+      publicKey:
+        Jason.OrderedObject.new(
+          id: "http://localhost/users/test#main-key",
+          owner: "http://localhost/users/test",
+          publicKeyPem: "PUBLIC KEY"
+        ),
+      endpoints: Jason.OrderedObject.new(sharedInbox: "http://localhost/inbox")
+    })
+
+    :ok
+  end
+
+  describe "GET /@username" do
+    test "renders ActivityPub JSON if Accept header is activity+json", %{conn: conn} do
+      conn =
+        conn
+        |> put_req_header("accept", "application/activity+json")
+        |> get(~p"/@test")
+
+      assert response = json_response(conn, 200)
+
+      assert is_list(response["@context"])
+      assert is_binary(response["id"])
+      assert is_binary(response["type"])
+      assert is_binary(response["following"])
+      assert is_binary(response["followers"])
+      assert is_binary(response["inbox"])
+      assert is_binary(response["outbox"])
+      assert is_binary(response["featured"])
+      assert is_binary(response["featuredTags"])
+      assert is_binary(response["preferredUsername"])
+      assert is_binary(response["name"]) or is_nil(response["name"])
+      assert is_binary(response["summary"]) or is_nil(response["summary"])
+      assert is_binary(response["url"])
+      assert is_boolean(response["manuallyApprovesFollowers"])
+      assert is_boolean(response["discoverable"])
+      assert is_boolean(response["indexable"])
+      assert {:ok, _dt, _offset} = DateTime.from_iso8601(response["published"])
+      assert is_boolean(response["memorial"])
+      assert is_map(response["publicKey"])
+      assert is_list(response["tag"])
+      assert is_list(response["attachment"])
+      assert is_map(response["endpoints"])
+      assert is_map(response["icon"])
+      assert is_map(response["image"])
+      assert is_binary(response["vcard:bday"]) or is_nil(response["vcard:bday"])
+      assert is_binary(response["vcard:Address"]) or is_nil(response["vcard:Address"])
+    end
+
+    test "renders HTML if Accept header is regular", %{conn: conn} do
+      conn = get(conn, ~p"/@test")
+
+      assert html_response(conn, 200) =~ "test"
+      assert html_response(conn, 200) =~ "Test"
+      assert html_response(conn, 200) =~ "test@localhost"
+    end
+
+    test "returns 404 if actor not found", %{conn: conn} do
+      conn = get(conn, ~p"/@nonexistent")
+
+      assert json_response(conn, 404)["error"] == "Not Found"
+    end
+  end
+end