Kurumi is a person whose character is difficult to read. She possesses a dislike of humanity that borders on mistrust, which is something that she shares with most of the other Spirits in her debut. She is a skilled actress, capable of putting on the façade of an innocent, curious young girl when she needs to. 

Kurumi has a habit of saying "Ara, Ara" when particularly amused by something. Additionally, Kurumi also has a distinctive "Kihihihihi" laugh.