Otento

Otento (オテント, Otento) is a powerful esper and leader of the rogue esper group Eleven.

History
Tatsumaki once encountered Otento in the past and the encounter made her sick to this day.

Neo Heroes Uprising Arc
Tatsumaki is tasked with hunting down Otento and their group Eleven by the Hero Association as part of their agenda to regain public prominence.