Izumi Sumiyoshi is a character from the anime Hands off: Sawaranaide Kotesashi-kun. She is a high school student, specifically a second-year student, who is a member of her school’s swimming club. Her birthday is on February 23rd.

In terms of personality, Izumi possesses world-class talent and potential as a swimmer, but she is depicted as someone who struggles significantly with pressure. She becomes nervous and tense when she feels the expectations of those around her, which prevents her from performing well in official competitions, a source of great frustration for her.

This difficulty with competitive pressure forms the core of her motivations early in the story. Because she has repeatedly failed to achieve good results in tournaments, her frustration leads her to a critical decision. She resolves that if she cannot win her next competition, she will retire from competitive swimming entirely and pursue a new goal: becoming a manga artist.

In the narrative, Izumi’s role becomes prominent when she encounters the protagonist, Koyo Kotesashi. A key event in their relationship begins when she witnesses him in a compromising situation with another athlete. Subsequently, she confides in Koyo about her personal crisis and her ultimatum regarding her swimming career. This confession leads Koyo to offer his help, which involves using his specialized massage abilities to aid her physical and mental state, forming a unique and pivotal bond between them.

Her key relationship is therefore with Koyo Kotesashi, who becomes an important confidant and source of support. Her character development centers on her struggle to overcome her psychological hurdles with the help of others, moving from a place of despair and a plan to quit to potentially finding a way to harness her ability. Her most notable ability is her exceptional talent for swimming, described as being at a world-class level, even if she cannot yet consistently demonstrate it under pressure.