So seems like there’s a logic in the cards:

Ace: Main characters? (HIDE!!!) Kaneki’s harem?
Number two: Aogiri members
Number three: Quinx
Number four: Precious babies? Must protect?
Number five: Secondary characters?
Number six: Precious babies? Must protect? 2.0
Number seven: Former (???) CCG members?
Number eight: Clowns
Number nine: CCG members
Number ten: No ideas
Jack: No ideas
Queen: Maternal figures? (Noro???)
King: Paternal figures
Joker: White haired dudes