a character with a recurring story habit of losing limbs, getting replacements, and getting those replacements torn off
That's a character introduced in the final arc (I think it's the final anyways? I'm not sure where it's considered as dividing, maybe the second to last if it's not the final) of the manga as part of a battle that kills off a bunch of minor characters and is implied to have killed many times more unnamed characters. She's one of the few who survives, albeit with severe injuries, and she keeps fighting with prosthetics after that (although mostly off-screen IIRC) as the story moves into a weird post-apocalyptic warzone setting.
I don't think the fight itself even comes off as particularly fetishy, since it's literally the same stuff that Deku and multiple other male heroes go through repeatedly, being maimed and continuing to fight, fully expecting to die in the process. I think Mirko's the only female character who's written as matching Deku's complete disregard for his own wellbeing. The story leans hard into that self-sacrifice angle for every major fight, for both heroes and villains, and with only a few notable exceptions that involves grievous bodily harm or permanent injury.
Considering that's the only type of scene the author's really good at wringing emotion out of (and he is good at turning bog-standard brutal anime fights into intense internal conflicts) I can see why he keeps doing it multiple times per arc.
That's a character introduced in the final arc (I think it's the final anyways? I'm not sure where it's considered as dividing, maybe the second to last if it's not the final) of the manga as part of a battle that kills off a bunch of minor characters and is implied to have killed many times more unnamed characters. She's one of the few who survives, albeit with severe injuries, and she keeps fighting with prosthetics after that (although mostly off-screen IIRC) as the story moves into a weird post-apocalyptic warzone setting.
I don't think the fight itself even comes off as particularly fetishy, since it's literally the same stuff that Deku and multiple other male heroes go through repeatedly, being maimed and continuing to fight, fully expecting to die in the process. I think Mirko's the only female character who's written as matching Deku's complete disregard for his own wellbeing. The story leans hard into that self-sacrifice angle for every major fight, for both heroes and villains, and with only a few notable exceptions that involves grievous bodily harm or permanent injury.
Considering that's the only type of scene the author's really good at wringing emotion out of (and he is good at turning bog-standard brutal anime fights into intense internal conflicts) I can see why he keeps doing it multiple times per arc.