[@Stern Algorithm] Don't worry, you don't have to read through the entire thread, although yep I recommend looking over the current arc from the last GM post. We can give you a summary of events so far if you'd like.

Anyway, on to the characters...

While your shrimp girl looks fun, some things need toning down a little. Since the sound attack is based on a pistol shrimp's snapping, a sudden burst of sound seems more likely than a Gang Orca-like paralysing ultrasound move. If it were more like Jiro's attacks, that'd be fine. Also, at this stage, smashing through concrete (at least with one blow) seems a bit much. I know you based that on a mantis shrimp's strength, but if you're going with her shell isn't tough enough to stop bullets, I say she should be able to crack concrete, only smashing it after several punches. Also doing this too much in succession would probably damage her shell, which of course would grow back, but that'd be a drawback in a fight. She could build up her strength over time.

Other than that, the way her Quirk affects her day-to-day life sounds interesting, and that sample post made me laugh. That clumsiness has good comedy potential.

As for your villain... Hmm, that Quirk would likely have more drawbacks than that, I've got to say. For one, all those staples and constant bio-rejection, wouldn't that be painful? Also, the peanut allergic reaction would set in faster than that, if it's bad enough for her to pass out after five minutes. She could get a very short boost of strength, like a minute or two, but if her throat swelled and her stomach cramped up in agony, that'd hinder her ability to fight.

Also have to say, not sure about the blood armour, since her Quirk is a side effect of immune reactions, not the ability to control the reactions themselves. At age 37 and as an experienced villain, it'd be unlikely for her to discover new uses of her Quirk anyway, and she already has regular armour so she wouldn't need it.

I don't know about the name of the Quirk either. Quirk names are usually snappy and to-the-point, whereas this one doesn't describe much except that it has to do with the lymphatic system.

I do like the backstory, though, and her loyalty being mostly elsewhere would make for some interesting conflict within the League of Villains.

If you make a few edits to both character sheets, I'll be happy to look over them again, and Heartfillia will give her input soon.