User blog comment:SirLinkalot96/Links to my old fan fic/@comment-4675595-20120113215011/@comment-3145713-20120114185101

Basically, users talk it over through their talk pages. You know, how their personalities will remain consistent, events that are agreeable from all sides, etc. When they come to an agreement, basically then the user has permission to include another user's OC into his/her story in accordance to what was agreed upon.