Mihoshi Takamura teaches at Keishin Academy and advises the elementary school girls' basketball team. She is the younger sister of Nayu Hasegawa and aunt to team coach Subaru Hasegawa.

Standing 154 cm tall, she possesses thigh-length purple hair and yellow or amber eyes, contributing to a youthful appearance frequently mistaken for childhood. School nurse Touko Hatano classifies this as loli-like. Her birthday falls on September 28 and her blood type is B.

Mihoshi blends mischievousness with sincere care. Lacking basketball expertise, she blackmails Subaru into coaching by threatening exposure of his childhood diary, which contained entries about wanting to marry his mother. Despite such tactics, she shows deep dedication to her students' welfare, sacrificing personal time to support them. She maintains a fierce rivalry with Ogasawara, the boys' basketball team coach, and exhibits preparedness, gathering opponent data through unconventional means.

She holds martial arts skills and a driver's license, though her athletic abilities are seldom displayed. Her development includes organizing a training camp to resolve team conflicts and experiencing a health setback when appendicitis temporarily sidelines her. Her name, meaning "beautiful star," reflects her surname Takamura's translation as "bamboo grove."

Throughout the series, Mihoshi prioritizes the basketball team's growth and successes, channeling her competitive spirit into fostering their development while balancing her teaching responsibilities.