I mean, that's possible. Having one Flame is rare in itself so I guess, but given the nature of the time of the RP compared to the Future time of the anime which is twenty years before the RP time, I'd say that having a Flame is much more common. So it's up to you there, but I'd say that a Flameless character is still significantly weaker than a character with a Flame, even if they have the physical strength.