Living on Kohaku Island brought Hisui great joy, as she developed an adoration for the sea and its creatures, particularly her dear dolphin companion Kairi. Sadly, her family's relocation forced her to bid farewell to her cherished life on the island. Despite facing criticism for her passion for swimming at her new school, Hisui was drawn to Minato, the swim team's standout athlete, with whom she easily connected. While Hisui was reminded of Kairi when she was with Minato, her fondness for him could be deeper than that.
