Nanami has Akuto Bita in her heart as in her fight with Shichika. If Ranma loses, he's revived and they have a rematch two weeks later.
A bit about Nanami: She can copy techniques; she gets a rudimentary version of something from seeing it once and masters it from seeing it twice. This extends to Naruto-style ninja powers and stuff like outright necromancy. She uses her power copying to dilute her allegedly much greater natural abilities and try to be weaker, but she doesn't really have any feats using only her natural abilities. She's capable of improving on what she's seen at least to some extent, so it's not as if she copies without understanding; we also see her intuit the weakness in a technique. She's fast enough to flicker in place and have a casual conversation while a low end bullet-timer's (her brother's) punch-blitz appears to just be passing right through her and subsequently strike him 200ish times (forget the exact number) so fast he's a little uncertain what parts of her body she hit him with. She uses the strength increasing technique of a tribe of people who far outclass her brother, who split a 15 storey castle down to its foundations. She doesn't have much for durability feats because she doesn't take any serious hits until she lets Shichika kill her, but she refers to herself as being extremely difficult to kill. At the very least, we know that poison doesn't work on her, and without Akuto Bita, she's constantly dealing with her own power ruining hr body to the extent that she should have died young. She can throw air-pressure attacks around like a bullet hell character (literally the visual metaphor we're shown for a slaughter she does), grow claws, and she has a technique for cancelling out the weight of things such that she can walk on water and sort of do leaf-on-the-wind dodging.