User blog:Fedorastorm/Need a hand here!

Okay ladies and germs, I've got a project for y'all

Here is a new OC I'm working on: Myra Consanza

Now, her whole spiel is that she has a split personality. I've been drawing inspration from existing characters like Krieg from Borderlands 2 and Allelujah Haptism from Gundam 00. I'v also been reading as much material as google can offer on how Dissociate Identity Disorder works, what happens in brainwashing, why people joins cults, but I don't think it's enough to create a decent, realistic character that does NOT offend anyone with misconceptions and stereotypes.

Now a brief summary of her is that she is an ex-Haven student/police officer, indoctrinated by a Grimm-worshipping group called the Order of the Black Dawn. the split personality comes from her brainwashing being about 95% thorough and her original persona being rather strong-willed. Basically, now she's got a serial killer dominating her brain and body while the real her is forced to watch.

What I'm looking for are people who can give thier $0.02 on what's the best way to write this character, things I HAVE to avoid like the dickens, and a plausible backstory for why anyone with even a drop of common sense would consider joining such a group.

A summary of what I have for her backstory So there you have it, look at my char, and please tell me what I should or should not do before I put her in pending and let the almightly reviewers have thier say.
 * graduated from Sanctum, went to police academy for extra skills/money to pay tuition. Went from happy-go lucky to a bit more cynical, having seen some of the worst humanity has to offer
 * started going to Haven
 * Encountered independant Grimm research group, offered internship (Group is front organization for the Order)