Yellow girl is a soft Yandere. It's much easier to call her than than making up an entirely new word.
There's no making up a new word, she's simply a masochist :P And she is not a yandere.
Ah, but she uses sadism to achieve masochism. So what do you call a sadomasochistic girl who teases another until she can be abused? Is she a masochistic sadist or a sadistic masochist? These are the questions we must ask ourselves.
She's not using sadism :P She's just playing the game and whenever the opportunity arrives she 'opens up and takes aaaall of it inside her'
My point is, she's not a yandere, whether it be a sadomasochist or simply a masochist fine. But not a yandere.
She fired a disruptor at purple and then proceeded to talk creepily about how cute she was when panicking over being at her mercy. I call that sadist behavior.
In any case, I do agree that Yandere is not a perfect word for it, but it's almost half as many syllables as sadomasochist and, on the internet, that counts for a lot. Despite the fact that we aren't speaking out loud. After all, what is the internet for if not pedantic arguments over the proper labeling of fictional characters while looking at porn of said characters.