I've seen some Servamp Mary-Sues and I was really really pissed off. I know it's not easy to make a good OC, but at least you should try to do it. If you make an OC - Don't rush! Good OCs need time and CHARACTER DEVELOPMENT, okay?
1. Don't make them look like one of the canon characters
This pisses me so off -.- It's really unoriginal and has no sense to copy the look of canon characters.
Most in common are genderbends of Sleepy Ash, Sakuya, Lawless etc.
Sorry to offend you, but it's unoriginal and boring. Do you have no other ideas?
OCs need an UNIQUE APPEARANCE, got it?
2. Don't make your OCs related to a canon character
*Sigh* This is so overdone...
I think in Servamp it's even more worse, because we don't know the whole background of all the characters.
Maybe they have no family anymore? Maybe they don't have any siblings?
So please avoid things like:"Sleepy Ash's sister", "Lawless cousin" or something like that.
Like I mentioned before it's overused, boring and ANNOY