I was gonna leave it alone, but since you decided to reply to me twice, here we go.Give me dumb, respects women, ripped and peggable any day. I don't want to teach your dude-bro, edgelord to be kind and soft this isn't beauty and the beast!
Honestly if I have to tell someone to rewrite their character because they couldn't pickup on contextual clues then I don't want to RP with that person.
First, you misinterpreted what I said. I meant that the discussion should happen before any kind of CS writing goes up. Nothing's been posted, nothing's been decided, it's literally just pitching an idea that they think could give a bit of spice to the RP. If the GM or anyone else isn't down for that, then that's fine, he just moves on to another idea that people would be more willing to accept.
With that out of the way, second is that I agree that this would be a problem if what I explained above doesn't happen first, or the CS is posted regardless of the consensus. If the GM doesn't want that type of character, and they tell you they don't want that type of character, don't use that type of character.
And third, going off of only the setting is not a good indicator of what characters should go there. There are plenty of characters in fiction that don't fit in their settings. Madoka Magica starts out showing that the characters are classmates that joke around and generally have few cares in the world. Fullmetal Alchemist has Maes Hughes, who wouldn't be out of place in a cheesy romcom. Teen Titans has Raven, who is an incredibly serious character in a world filled with comedic situations (And occasionally drama).
You know what happened to those characters? The girls were shown the dark secrets of the world. Maes was killed and his family was left to mourn, in scenes that were heartwrenching because he was such a bright personality. And Raven became the deadpan snarker, applying a specific type of comedy to the scenes in a way only she could bring. They worked because their personalities were written into the story, and used as an additional launching point for the work's overall goal.
I'm not saying this is the case everywhere, in fact most of the time everyone's characters stay exactly what they are the whole way through, especially in RP. I'm saying that there's a chance they could have a cool idea planned out for putting a character like that into a setting like this, and that should be discussed before any major decisions are made.
I hope this gives you something to think about. Have a nice day