These are how I imagine my characters but feel free to come up with your own vision for them.
Also, their nicknames are placed in brackets.
Empress Black (EMY/EM)
Kim JongWoo (King)
Dean (D)
Felix
Kitty Kat (Kit/Kat or both as in KitKat)
Alissa Blake
Nala (Empress's mother)
Marcus Ellis
Kevon Edgar Black (Mr. Black/Edgar)