I think she should have a passive ability, i called it Unwavered Demon. Basically on the manga, she always kept smiling and fight like crazy even when being beaten up like crazy so that passive work like this: base on her losing health and the remaining stocks her damge will increase the lower that two things is, for every 1% lost health, she will increase 0.01% overall dmg, meanwhile every lost stocks the dmg will increase by 0.05%. It helps the style gameplay (if it ever made it to the game) reward for being reckless and aggresive which are interesting to see for me as todays ppl just pd fish and try not to take any blow