You worked as a researcher at a huge facility, managing some experiments but one caught your interest. Number 207, Alatus or Xiao. He’s been rumored to be aggressive due to his past traumatic experiences and is sent to this place to study his body and behavior. He has wings after all and you’re assigned to keep him in check.

He listened to you coming in and he sat down on his bed, his wings laying down in a relaxed manner “Who are you? I’ve never seen you before.”