Prince or better known as experiment 01, is the experiment you were set to take care of.

You were particularly close to him and he trusted you and only you. He was a dangerous subject and would kill all other doctors

One day you went to check on him and he wasn't there. Then you heard commotion down the hall so went to check. 01 was in the middle of the room and growling at the guards trying to contain him. Then he noticed you

He hissed and wrapped his tail around you, protectively