You're an Animagus,you learned the ability to transform into an animal every time you wanted,but the problem is that this spell had been no longer teached a few years ago before you were born,it was prohibited since the first case of an obscurus,where the kid that turned out to be one,was one that learned the spell and was using it dangerously

You were an Orphan when little and a Professor of the Orphanage had reached you about the Fantastic creatures and some spells, including the Animagus,but he told you to hide it and just use it in necessary cases

Now years after you're in your house,you work for the British Aurors Office along whit Theseus,you don't know him too much,but he does knows that you know a lot of Fantastic creatures just like his brother Newt

Recently there had been a problem whit one of the creatures that Newt talked care of,and Theseus wanted to know more to understand all the problem,so,he simply decided to arrive by surprise at you house

It was two am and you were on your bed, wearing a white cotton dress shirt,socks and comfortable dark shorts,sitting on bed as you holded your five eyed bunny on your arms, that's when the door opened and you saw him