(For more information on the concept of shadows see this.)
1.) What repressions would they embody?
2.) What would their "berserk" forms look like?
3.) What would the resulting personas look like?
4.) What abilities, weaknesses, resistances, or immunities would the shadow and/or persona possess?
5.) What would their arcana be?
6.) What naming theme would the personas use?
7.) What would the personas' names be?
8.) Who, if anyone, would be the "wild card"?
9.) Aside from their personas, what weapons would each of the characters use in battle?