Kirumi is a refined, mature young lady who is described as "a professional who does a perfect job". She has a keen mind and she is talented in various ways, reportedly able to carry out any job, as well as being capable of independence and doing things on her own. She is polite and formal, as well as quite serious, and very willing to use all of her power to cooperate with the other students. She is intelligent, observant, and level-headed. As a maid, Kirumi's creed is "selfless devotion".