The reason why Roxas looks like Ven is at the end of Chain of Memories Sora was put to sleep but the the room that he was in was the The Chamber of Waking which Xemnas was trying to find but Roxas couldnt get Soras body cause Sora had a heart at the time so Roxas use Vens body which was in the Chamber of Waking also Roxas has no memory because Vens memories got "earse" in brith by sleep.
The reason why Roxas looks like Ven is at the end of Chain of Memories Sora was put to sleep but the the room that he was in was the The Chamber of Waking which Xemnas was trying to find but Roxas couldnt get Soras body cause Sora had a heart at the time so Roxas use Vens body which was in the Chamber of Waking also Roxas has no memory because Vens memories got "earse" in brith by sleep.