Arisu Himeno is a supporting character in the anime Myriad Colors Phantom World. She is a 26-year-old teacher at Hosea Academy, where she serves as the faculty advisor for the Phantom Hunters Club. Her primary role involves assigning official jobs to students, tasking them with dealing with troublesome phantoms in exchange for monetary rewards. Beyond her teaching duties, she is also a member of the Alayashiki Research Facility, indicating her involvement in the broader scientific study of the phantom phenomena.

In terms of appearance, Arisu is a youthful woman with straight, light brown hair that reaches her upper back, purple eyes, and circular glasses. Her typical attire consists of traditional Japanese clothing worn underneath a white lab coat, paired with pantyhose and black high-heeled shoes. Her outward demeanor is one of kindness and calmness. She is consistently seen with a gentle smile and is known for giving sound advice to her students, which has made her quite popular among the academy's attendees. She appears approachable and supportive, readily offering help to students who encounter problems.

However, this gentle exterior belies a more formidable capability. Despite her calm and motherly disposition, Arisu is highly proficient in combat, specifically utilizing what are referred to as driver techniques to devastating effect against phantoms. This duality is a notable aspect of her character, as she can be both a nurturing mentor and a powerful fighter when the situation demands it. Her key relationships are primarily with the students of Hosea Academy, particularly the main group of phantom hunters whom she guides and supports through their missions. The narrative does not provide extensive detail on her personal motivations beyond her professional responsibilities as a teacher and researcher, but her actions consistently reflect a commitment to guiding the next generation of phantom hunters and contributing to the understanding of phantoms through her research facility work.