She's kind of an ascended character in the fandom, overall; the anime adaptation in particular does a lot more with her than Takahashi ever did; I doubt she intended her big role. And this first storyline is probably going to illustrate what I mean.
Anyway they're all badasses.
Spoilers, she got Shampooed. Literally. Memory-altering shampoo. That's why the character's name is Shampoo. This one gimmick she never uses again.
Exchibit A) for: Shampoo was meant to be a one-note gimmick.
Think about it. Both poisoners. Neither respects any opponent and will use dirty tricks. The main difference is that Shampoo is cute. That's it. That's why she's forgiven.
Oh yeah I'm ready to be charbroiled for this one.
And now the tension of the chapter goes back to gender presentation. In order to resolve this, one way or another, Ranma is going to have to essentially *come out.*
Welcome to trans reading central!
Despite the danger she knows this presents, despite it not helping to resolve the issue of Shampoo wanting to kill her.
*this is her choice.*
Kuno is in like fourth place, for reference.