Citrine

She is a junior and Kirara's classmate.
Although she was a childhood friend of Kirara when she lived in Demon World, she came to the human world earlier.

Despite being a demon, she is exceptionally knowledgeable about the human world. She often corrects Kirara's biased understanding of the mortal realm. (Kirara is not listening, though)

Citrine is a hyper-realist and has a solid plan for the future.
Her hobbies are part-time work and saving money.
She works part-time at Cafe Bismuth and has several other part-time jobs.
According to Raito, while she looks greedy and believes that "time is money," she is also a discerning individual, unwilling to take up other people's time.

Citrine loves playing RPGs as the gameplay involves grows steadily by accumulating experience. She also has a hobby of learning game-style offensive magic but does not have a chance to use it.

Likes: facts, reality, part-time jobs, offensive magic
Dislikes: working for free