Aiuchi Ranma

Ranma was once a energetic and chaotic boy, full of life, he was also born in an aristocratic family, but that all changed when a demon slaugthered his family and managed to survive due to the arrival of demon slayer, the slayer took pity in him, and decided to raise him up, as he grew up, his dreams changed and he wanted to be person who will protect others as his adopted father did to him, he trained under a cultivator of thunder breathing and quickly perfected the technique, so much so that he created two new forms for the originally 7 forms of the thunder breathing, named "8th form, roar of the lightning" and "9th form, Thunder god rising blitz dance" he quickly passed natural selection at the age of 15 and became one of the strongest of that era, he also became an hashira in the age of 18, by taking down a lower moon demon, he went on helping others and, though he never got to taking out the demon king himself, he died knowing he did what he could do, wholeheartedly.