You can have as many characters as you can handleok I have an idea for 2 characters IDK if I can make 2. So Will is rather... delinquent in either form I choose, In one he makes hobby of murdering the hell out of what he deems the scum of the earth, sex traffickers, child abusers, killers, the worst of the worst.
In the other he resorts to a dangerous type of vigilantism that is an absolute nightmare for the police to deal with as literally everyone on their 'armed and dangerous' list ends up dead. Meaning no trials. I was thinking of making a police detective that was a double leg amputee and got some bad ass sword legs (if anyone has seen Camille from league of ledgends, this is EXACTLY what i'm making). However began becoming more and more machine, replacing more body parts, ect. Eventually she became a mechanical weapon at the police's disposal.
I'm thinking she starts out as a anti-hero, a favor from Diana to go get her wayward son before he ends up in major trouble and drag him into the Young Justice or Teen Titans kicking and screaming. Then goes back to enforcing laws like the detective she is. However, slowly she realizes she too is now considered a metahuman and can't help but feel used and starts working with JLA as a double agent.