Ikuto Yufu is vice-captain of Doshisha University's rugby team, playing left center backs as a fourth-year student with jersey number 12. He possesses a relatively tall, slim yet muscular build, pale complexion, neck-length powder blue hair, and blue eyes, sometimes appearing sickly.

Perceptive and intelligent, Ikuto readily identifies and resists flattery or manipulation attempts, such as those by Natsusa Yuzuki. He consistently warns teammates when observing their deception, though they ignore his advice, reflecting his confidence in assessing character.

His responsibilities involve team management logistics. When Natsusa rejoined the team non-competitively, Ikuto intervened as Ethan Taylor physically lifted Natsusa, instructing Ethan to release him given Natsusa's first day. Later, Ikuto pragmatically supported Natsusa’s transition into a managerial role after fixtures began, citing the team's personnel shortage. He advised Natsusa against troubling captain Gakuto Zaitsu and formally announced Natsusa as trainer/manager during a team meeting, surprising members. Ikuto permitted Natsusa's dorm residence for managerial convenience, referencing prior occupancy.

Conflict emerged when Natsusa recruited player Yuu Mashiro as an additional manager. Ikuto confronted Natsusa, clarifying recruiting active players violated his intent and expressing frustration. This incident reinforced his structural oversight, as other players requested female managers—prompting Natsusa to placate them with flattery while Ikuto issued ignored warnings about their gullibility.

His given name etymologically signifies "cultural progress, perfume" and "Dipper," while his surname combines "reason, case, cause" and "cloth."