[EnigmaticAxiom]

Originally Posted by Dreyakis

Spoiler for Correction:

I believe her sister was Kobayakawa, the one whose CAD was sabotaged during the first round for Mirage Bat and subsequently fell from the sky. The girl's motive for vengeance comes from her belief that Tatsuya allowed her sister to fail because the only he cares about is Miyuki. While the second half of that statement is true, the first portion is not. The simple matter is that Tatsuya is not omniscient nor omnipotent. Things will happen that are out of his control and events will occur that he will not foresee. I agree that while her motivations make sense, seeing as grief works differently on different individuals, I do concur that objectively speaking, her motivations are fairly flimsy at best. She's merely lashing out at the first available target to avoid succumbing to grief.

I do believe that her collaborators are fanning the flames of her hate to serve their interests, but since she's only a pawn in their plans, it's not like they invested a whole lot into her anyways.

Spoiler for Okashira was right :x:

The girl is Hirakawa Chiaki. I wasn't sure myself and thought you might be right, so I went to the raws. I don't think they make many references to their relationship, though. I can only recall one or two times from the web novel :/