Character is Epsilon from "The Eminence in Shadow", an isekai series that is sort of tongue in cheek and self aware take on the genre and edgelord content with a lead character who trained and constant research constantly in both his original world and the other world he's now in for the chance to play the role of a badass working in the shadow because "Shit would be dope if I do this."
Also thanks to the slime suit she's wearing and her constant fine tuning and expertise in controlling the flow of magic, she intentionally gives herself a more fuller figure.
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Asocial, not introverted. Know the difference. In a capitalist society, money and life are one and the same.