Rumi Yokoi [PonyXL] (Tonari No Seki-kun / となりの関くん)

Rumi Yokoi is the main protagonist and narrator. She continuously attempts to pay attention in class, but is almost always distracted by her neighbor's antics. She sometimes tries to make Seki concentrate on class by sabotaging his projects, but usually finds herself joining in on them, though Seki misunderstands these attempts. She is rumored to like Seki.