Firstly about Johnny is that their human -> feral form is their canon form which will have the most information (Personality/Story)
I might add a lot of info about their anthro form later which is their current reference image(s)

Personality

Even if Johnny may come across as intimidating due to their size and their general aura of a
resting sad face and general quiet and unreadable demeanor, they are absolutely incapable of
hurting a fly................ physically that is.

How do I put this... Johnny has a habit of a

Story:

-Started working at human experiment facility (chosen work place)
-Already discriminated against due to them being a halfling (only half demon)
-got assigned to man-lee
-started exploring their gender together with Man-Lee
-allowed and helped Man-lee transition
-further discrimination from ppl making fun of their gender
-slowly but surely manipulated Man-lee more and more
-starting to get fed up with the torture and starts feeling absolutely horrid about it
-realizes they are in love with Man-Lee
-makes plans to escape with him like a lil schoolgirl freshly in love
-Facility collapses and thus gives both of them a chance to escape
-liiving together with man-lee but abusing the absolute hell out of the DID system
-found by Genaro, captured, locked into his basement and almost killed during torture
-Now send to missions with Man-Lee by Genaro