Nobuko Takada (Jujutsu Kaisen/呪術廻戦/Idol)

Underappreciated? Yes, there is almost no art out there of this girl. The pain of simply being there for someone else's motivations in stories. Nonetheless, after seeing her in season 2 and rewatching her interaction with Mai a few times I've grown to adore her. That should change, especially since she is a tall girl with a big ass.