Ōki (also known as Yìng Jǐ) commands a newly established anti-Wangliang unit dedicated to confronting demonic threats. A prominent facial scar marks his face, a permanent reminder of a childhood monster attack that exposed him to death and forged his profound empathy for victims of supernatural afflictions.

He wields ink-based magic, executing spells through rapid calligraphic brushwork. This penmanship-focused combat style generates offensive and defensive effects against wangliang, demanding precision and swift execution.

Ōki exhibits deep empathy, particularly toward the possessed. He prioritizes understanding their suffering over lethal force, listening to their grievances to address the root causes of spiritual corruption and free them from demonic control.

As unit leader, he coordinates team strategies by integrating specialized skills like spirit purification and demon extraction. His leadership emphasizes collaborative tactics that neutralize threats while minimizing harm to possessed hosts. His recruitment initiated the unit’s reformation, though his specific background ties remain undefined.