User blog comment:IWM/OC and Persona: What's the Difference?/@comment-24260323-20160108163929

There isn't anything really wrong with making a Persona or OC here. Don't take this personally, but It's just that after watching RWBY, we've come to sorta dislike "Self-Insert" characters.

We make OCs which follow the Rules so they can be as close to Canon as possible as well as to make sure they are balanced for Roleplaying purposes.

In Roleplaying, we make a scenario and put ourselves in a different role, and act out how the situation would play out.