Otento is a formidable esper who heads Eleven, a renegade band of espers. A webcomic-only figure, he is menacing enough that a past run-in still leaves Tatsumaki unsettled, and the Hero Association eventually sets her loose to hunt him down.
Little of Otento's temperament has been shown, but the mere memory of crossing paths with him still turns Tatsumaki's stomach, a sign of just how unnerving the rogue esper can be.
Sometime in the past Tatsumaki encountered Otento, and the meeting left a sickness in her that lingers to this day. Later, hoping to rebuild its slipping public standing, the Hero Association assigns her to track down Otento and the rest of Eleven.

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Otento is a formidable esper who heads Eleven, a renegade band of espers. He appears only in the webcomic and is menacing enough that a past encounter still unsettles Tatsumaki.
Otento leads Eleven, a rogue faction of espers. As the head of the entire group, he is presumed to command considerable power.
Tatsumaki crossed paths with Otento sometime in the past, and the meeting left a sickness in her that still lingers. Even the memory of the encounter turns her stomach.
The Hero Association assigns Tatsumaki to track down Otento and the rest of Eleven in hopes of rebuilding its slipping public standing.
Otento's abilities include psychokinesis, though firm details about his powers are scarce. As the leader of an entire esper faction, he is presumed to wield considerable strength.
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