Hosenka serves as a medical-ninja operative in the Akane Class's Monkey Squad, partnering with squad leader Mokuren and hotheaded teammate Tsuwabuki. She vocally criticizes her team's moniker as lackluster, habitually provoking the Dog Squad to name-stealing contests despite knowing victories won't change official designations. Her explosive dynamic with Tsuwabuki thrives on theatrical arguments that mask mutual loyalty, cementing her position as the class's second-most disciplined troublemaker. This notoriety peaked when she conspired with Ume during a food challenge, shapeshifting into competitor Itadori—only for Asagao's bottomless stomach to unravel their deception.

Skilled in both healing arts and combat trickery, Hosenka deploys her Shuriken Clone Technique to multiply projectile threats mid-battle. Her animosity fixates on Dog Squad's Sazanka, whose derisive "shorty from Saru Squad" taunts ignite relentless inter-squad skirmishes.

At 130 cm, her compact stature contrasts with audacious antics. She snacks obsessively on fish bones and nurses an abiding grudge against Sazanka, fueling confrontations that define her rebellious reputation.