Shirogane Jin is a Japanese high school student with a deadpan expression.
Other than being poorer than most people, he's entirely unremarkable.
If he had to name one more trait, Shirogane Jin would say he's not a good person, and will do whatever it takes for his own benefit.
It's just that other people don't see it that way...
(PS: The slice-of-life worlds featured so far are Kaguya-sama: Love Is War, The Pet Girl of Sakurasou, We Never Learn, The Devil Is a Part-Timer!, Eromanga Sensei, and How to Raise a Boring Girlfriend.)