Kurosu Reina

She is a shy girl who is not good at communicating and gives off a dark-rooted vibe.
She is the only member of an occult club that is about to close down.
She and the protagonist, who has been assigned as an adviser, investigate the underworld together.

She has no friends, and her hobby is to accumulate magical knowledge.
She's not even good at talking to people, but she listens.
She is a nerd who becomes so talkative that she stops paying attention to his surroundings.
She is the heir of Cross Pharma, a well-known new pharmaceutical company in the medical field.
She feels very burdened by the expectation to be the key figure in the next generation of the company.