Some people say Blaze is a Mary-sue...Do toi think she's a Mary-sue?

No.
She`s an original character, how can people say she`s a mary-sue?
...
i think people that think blaze is a mary-sue are real dumb. *if it`s my friends, then they don`t count because i don`t want to be rude to them*

The only people who calls her a mary-sue are probably just the ones that first saw her in Son06. In that game, many viewed her as a Mary-sue. But I have to disagree with them. She's actually the only good female character that's not really useless.