Miko has a mysterious demeanour around her. When she assumes her duties as the boss of the Yae Publishing House, she is known to be very kind and enjoys reading books and stories, although she also shows an obsessive side in making profits at the same time. She has an enigmatic air around her, with her friends growing used to it. When speaking with outsiders or close friends, she shows a blunter and more cynical side to her. Miko does not mince words, even towards her friend and master Ei.

As a kitsune and youkai, she's very mischievous, including in her roles as Guuji and owner of Yae Publishing House. She couples this mischievous streak with impressive skills of manipulation and reading people. As such her tricks and pranks are usually elaborate, long-winded affairs towards rather simple ends, which she does out of enjoyment and the fact that she enjoys watching people squirm. This has caused many people, such as Thoma and Gorou to become easily terrified upon seeing her. If not partaking in such affairs, she shows interest in those who get her attention.

Despite her light-hearted, mischievous personality, she showed a more emotional side during the Hyakkiyakou, indicating that she does genuinely care for those in her life and has considered thousands of youkai from across Inazuma to be her friends. Though in typical fashion for her, she quickly turns the Traveler and Paimon's sympathy into an opportunity to trick them into paying for an expensive dinner.