Ren Ōmimi, a third-year at Inarizaki High, commands the volleyball court as the team's middle blocker. Standing 191 cm tall, his imposing height and long arms make him one of the tournament's tallest blockers, contributing significantly to his defensive impact. His appearance features narrow eyes, long thin eyebrows, and neatly combed short dark hair swept right, projecting an initially intimidating aura that softens post-timeskip. This contrasts sharply with his genuinely mild and respectful personality. He possesses sharp observational skills, noting details like teammate Shinsuke Kita's cleaning routines. During the Spring High Nationals against Karasuno, Ōmimi's quick reactions were evident early, showing alarm at Kageyama Tobio's ability to handle a messy set. He engaged intensely in blocking duels, countering Hinata Shoyo's quick attacks and Tanaka Ryunosuke's spikes. His analytical approach shone when he successfully countered Tanaka's inner cross spike by recognizing the pattern and dismissing hesitation, replicating this effectiveness at crucial moments. Ōmimi predicted spiker intentions and adapted tactics based on opponent tendencies. He maintained composure under pressure, bolstering Inarizaki's defensive stability as commentators noted the team's sharpened blocking during the match. Ōmimi's relationships focus on his Inarizaki teammates, particularly captain Shinsuke Kita. Both third-years share Class 3-7 and exhibit mutual respect through frequent sideline conversations during games. Ōmimi sometimes explains Kita's habits to younger players; their formal yet close dynamic draws playful "married couple" comparisons from teammates like Atsumu. Blocking is his primary strength, leveraging his height and reach for effective one-touches and solid blocks. His strategic decision-making is clear, such as prioritizing blocking assignments against Tanaka based on prior analysis. His balanced attributes rate power, game sense, technique, and speed at 3/5, jumping at 2/5, and stamina at 4/5 during high school. Post-graduation, Ōmimi works as a customs officer in Osaka as of 2021. Trivia notes include his favorite food (whitefish sashimi), star sign (Aquarius), status as Inarizaki's youngest third-year, and name origin: "Ōmimi" meaning "large ears" and "Ren" meaning "kneading/practice," referencing the bat-eared fox.