Kimie Arashiyama is a character from the series MARRIAGETOXIN. She is a young woman who belongs to the Dogo family, one of the prominent clans of specialists, and holds the title of Hamster Master as a descendant of the beast master lineage.

In terms of background, Kimie was not always part of the structured Dogo household. She and her older brother, Kimihiko Arashiyama, spent a portion of their childhood living on the streets, where her brother took care of her and taught her essential survival skills. This difficult period ended when her brother was recruited by the Dogo family, leading him to leave Kimie behind under the care of the clan to ensure her safety. This event has had a lasting impact on her, and a significant part of her personal journey involves searching for her long-lost brother.

Kimie is portrayed as having a gentle and earnest personality. She harbors secret feelings of admiration for Hikaru Gero, the series' protagonist, stemming from an incident in her childhood when he saved her. This admiration develops into deeper romantic feelings as the story progresses, leading her to confess her feelings to him. Her loyalty and courage are also demonstrated when she finds herself in peril, such as becoming the target of an attack by the head of the beast clan, which requires Gero and his allies to mount a rescue mission to the Dogo family headquarters.

Her role in the narrative is closely tied to the Dogo Animal Kingdom arc, where her past is explored in greater detail. She is also a potential romantic interest for Gero, whose mission to find a bride drives the overall plot. Her abilities as a Hamster Master allow her to communicate with and control hamsters, using them for various tasks. Physically, Kimie is a young adult female with green eyes and long pink hair that reaches her waist. Throughout the series, she navigates her dangerous life as a specialist, her quest to reunite with her brother, and her growing feelings for Gero.