Seike Taroumaru, alias Seike, is a male esper working for Scavenger, a covert unit contracted by Academy City’s Board of Directors to erase evidence and eliminate witnesses. His androgynous features, paired with a sailor-style school uniform and short skirt, frequently cause others to misidentify him as female—a misunderstanding he clarifies during a clash with Misaka Mikoto by assertively using the masculine pronoun *"ore."* His esper ability, Stick Slip, grants control over friction coefficients within a one-meter radius. By maximizing friction, he can paralyze adversaries or negate it entirely to launch himself at high velocities. This power proves effective in disabling mechanized units and altering attack trajectories, though he avoids relying on external tools like magnums for propulsion, finding their use cumbersome. Though quieter and more reserved than his teammates, Seike exhibits a sly streak, provoking foes mid-combat with teasing remarks. While he feigns solidarity with Scavenger’s collective disdain for authority figures to maintain unity, he privately lacks their fervent hatred. His pragmatic mindset aligns with the group’s mercenary ethos, executing missions without hesitation—whether targeting Anti-Skill personnel or dismantling rival factions. Recruited as Scavenger’s final member, Seike participates in pivotal operations such as the Necromancer Arc, where the group is tasked with annihilating Disciplinary Action. Here, he battles Tarantula mechs and hunts survivors alongside teammates before their collective defeat by Accelerator. Later, during the Dream Ranker Arc, he aids in apprehending a cyborg duplicate of Kuriba Ryouko. A mistaken assumption about Misaka Mikoto’s gender sparks a confrontation where his friction manipulation initially neutralizes her electricity, though she ultimately prevails. Post-mission, he humorously proposes aesthetic upgrades to Scavenger’s teamwork during debriefings. In covert operations, Seike pilots paper-based craft engineered by teammate Naru, augmenting their performance through friction adjustments. His actions exemplify Scavenger’s role in Academy City’s shadowy underbelly, balancing ruthless efficiency with superficial camaraderie to adapt to shifting objectives.