The Unyielding Childhood Friend. Yui Takemiya is a spirited and energetic young woman, known for her unwavering determination and competitive nature. Born and raised in the same neighborhood as the protagonist, she has been their osananajimi (childhood friend) since kindergarten. Yui is a high school student with a strong sense of duty towards her friends and an unyielding spirit that refuses to back down from any challenge. She is a talented athlete, excelling in various sports, and is always eager to lend a helping hand to those in need.