diff --git a/homeassistant/components/fritz/coordinator.py b/homeassistant/components/fritz/coordinator.py
index 4d5d743560e..46acad68545 100644
--- a/homeassistant/components/fritz/coordinator.py
+++ b/homeassistant/components/fritz/coordinator.py
@@ -467,8 +467,7 @@ class FritzBoxTools(DataUpdateCoordinator[UpdateCoordinatorDataType]):
             self._devices[dev_mac].update(dev_info, consider_home)
             return False
 
-        device = FritzDevice(dev_mac, dev_info.name)
-        device.update(dev_info, consider_home)
+        device = FritzDevice(dev_mac, dev_info, consider_home)
         self._devices[dev_mac] = device
 
         # manually register device entry for new connected device
diff --git a/homeassistant/components/fritz/entity.py b/homeassistant/components/fritz/entity.py
index ad2a4d831d0..ef662737ad8 100644
--- a/homeassistant/components/fritz/entity.py
+++ b/homeassistant/components/fritz/entity.py
@@ -33,11 +33,9 @@ class FritzDeviceBase(CoordinatorEntity[AvmWrapper]):
         )
 
     @property
-    def ip_address(self) -> str | None:
+    def ip_address(self) -> str:
         """Return the primary ip address of the device."""
-        if self._mac:
-            return self._avm_wrapper.devices[self._mac].ip_address
-        return None
+        return self._avm_wrapper.devices[self._mac].ip_address
 
     @property
     def mac_address(self) -> str:
@@ -45,11 +43,9 @@ class FritzDeviceBase(CoordinatorEntity[AvmWrapper]):
         return self._mac
 
     @property
-    def hostname(self) -> str | None:
+    def hostname(self) -> str:
         """Return hostname of the device."""
-        if self._mac:
-            return self._avm_wrapper.devices[self._mac].hostname
-        return None
+        return self._avm_wrapper.devices[self._mac].hostname
 
     async def async_process_update(self) -> None:
         """Update device."""
diff --git a/homeassistant/components/fritz/models.py b/homeassistant/components/fritz/models.py
index 9d917f4ac16..83bb790dc58 100644
--- a/homeassistant/components/fritz/models.py
+++ b/homeassistant/components/fritz/models.py
@@ -77,17 +77,21 @@ class HostInfo(TypedDict):
 class FritzDevice:
     """Representation of a device connected to the FRITZ!Box."""
 
-    def __init__(self, mac: str, name: str) -> None:
+    _connected: bool
+    _connected_to: str
+    _connection_type: str
+    _ip_address: str
+    _last_activity: datetime | None
+    _mac: str
+    _name: str
+    _ssid: str | None
+    _wan_access: bool | None
+
+    def __init__(self, mac: str, dev_info: Device, consider_home: float) -> None:
         """Initialize device info."""
-        self._connected = False
-        self._connected_to: str | None = None
-        self._connection_type: str | None = None
-        self._ip_address: str | None = None
-        self._last_activity: datetime | None = None
         self._mac = mac
-        self._name = name
-        self._ssid: str | None = None
-        self._wan_access: bool | None = False
+        self._last_activity = None
+        self.update(dev_info, consider_home)
 
     def update(self, dev_info: Device, consider_home: float) -> None:
         """Update device info."""
@@ -100,8 +104,7 @@ class FritzDevice:
         else:
             consider_home_evaluated = dev_info.connected
 
-        if not self._name:
-            self._name = dev_info.name or self._mac.replace(":", "_")
+        self._name = dev_info.name or self._mac.replace(":", "_")
 
         self._connected = dev_info.connected or consider_home_evaluated
 
@@ -115,12 +118,12 @@ class FritzDevice:
         self._wan_access = dev_info.wan_access
 
     @property
-    def connected_to(self) -> str | None:
+    def connected_to(self) -> str:
         """Return connected status."""
         return self._connected_to
 
     @property
-    def connection_type(self) -> str | None:
+    def connection_type(self) -> str:
         """Return connected status."""
         return self._connection_type
 
@@ -140,7 +143,7 @@ class FritzDevice:
         return self._name
 
     @property
-    def ip_address(self) -> str | None:
+    def ip_address(self) -> str:
         """Get IP address."""
         return self._ip_address
 
diff --git a/homeassistant/components/fritz/switch.py b/homeassistant/components/fritz/switch.py
index a452c4821bd..09e473d868a 100644
--- a/homeassistant/components/fritz/switch.py
+++ b/homeassistant/components/fritz/switch.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import logging
-from typing import TYPE_CHECKING, Any
+from typing import Any
 
 from homeassistant.components.network import async_get_source_ip
 from homeassistant.components.switch import SwitchEntity, SwitchEntityDescription
@@ -524,8 +524,6 @@ class FritzBoxProfileSwitch(FritzDeviceBase, SwitchEntity):
 
     async def _async_handle_turn_on_off(self, turn_on: bool) -> bool:
         """Handle switch state change request."""
-        if TYPE_CHECKING:
-            assert self.ip_address
         await self._avm_wrapper.async_set_allow_wan_access(self.ip_address, turn_on)
         self._avm_wrapper.devices[self._mac].wan_access = turn_on
         self.async_write_ha_state()