Satsuki Gokajou commands the track field as the protagonist's school athletics coach. She champions physical strength above all else, radiating a boisterous and fiery energy. Her actions and words often erupt without warning, yet a surprising sweetness softens her fierce exterior. This potent contrast earned her the "Bear-Woman" nickname, reinforced by her beloved bear-patterned pajamas and spirited, animalistic tendencies.

She possesses distinctive light blue hair cut neatly at her neck and sharp bluish-gray eyes. Standing 158 cm (approximately 5'2"), her figure measures 84-56-81 cm. Born on May 19th with blood type B, athletic prowess flows in her blood; her father is retired professional wrestling legend Hiroto Gokajou, once known as "Giant Gokajou." Within her family, she answers to the affectionate nickname "Saki."

Within the protagonist's home, Satsuki embraces a nurturing role alongside fellow teachers, forming a unique maternal collective. Her signature method of care manifests through intense physical training sessions. Her core traits remain unwavering: a whirlwind of impulsive energy fueled by deep, genuine concern for those she protects.