Arata Sena competes in LBX battles while attending Kamui Daimon Tougou Gakuen. His family background suggests financial comfort, though not the affluence of some peers, enabling discretionary spending on his interests. He lives in dorm room 302, adjacent to characters such as Sakuya in room 301. Arata demonstrates notable creativity during combat, leveraging this trait to navigate difficult situations. He possesses a personality quirk involving difficulty interpreting social cues, often missing subtle hints in interactions. His LBX units reflect progression: starting with Achilles Deed, switching to Dot Phasor after significant damage, and ultimately piloting the Dot Blastrizer, specifically designed to harness his Overload ability. A significant power awakening occurs during a critical battle when Arata unlocks the Overload ability, enhancing his combat prowess. He refines and masters this ability through subsequent conflicts, indicating substantial growth in skill and control. Key battles include team engagements, like partnering with Muraku Houjou against Ban Yamano and Jin Kaidou, resulting in defeat. Later rematches against Ban, utilizing upgraded units like Achilles and Achilles Deed, end in draws due to mutual LBX breakdowns from powerful techniques. Administrative hurdles impact his journey; initially unable to leave Kamui Island because Josephine Daimon hadn't signed his withdrawal form. After resolving this issue, he departs the academy. His known special techniques include Lightning Lance and Cosmo Slash, deployed during key battles.