What do you mean out of character>?
In character VS Out of character.
It's a matchup stipulation like distance or anything like that.
Like if it was Naruto VS Sasuke at their first VOTE fight and they were out of character Naruto would feel no emotions towards Sasuke, no qualms about killing him, etc.
Essentially we'd be debating what techniques they could use instead of whether or not they're likely to do this or that.
Like it would be out of character for Itachi to use Amaterasu on someone straight from the first second.
It makes debates more interesting out of character because we don't have to argue like "Oh well Neji isn't like that he would never rush in and do that"
We just argue what we say they'll do.
That was a little long-winded, but does that make sense?