Sui-Ki

Sui-Ki (スイキ, Suiki) is a recurring demon in the series.

Appearances

 * Shin Megami Tensei III: Nocturne: Brute
 * Shin Megami Tensei: Strange Journey: Brute
 * Persona 4: Moon Arcana

Shin Megami Tensei III: Nocturne
Sui-Ki is one of the four Oni that were part of the Mantra demons' elite force. But they made a mistake which angered Thor and they were forever banished from Ikebukuro. The once elite Oni group became mere petty thieves who mugged anyone going through their scattered hideouts around the Ikebukuro Tunnel.

Sui-Ki's hideout is located around a trapped area within the tunnel after going through a pitfall. He presents himself as a cold demon who would leave those who demonstrate courage alone. But if Hito-Shura feigns cowardice, Sui-Ki will attack.

Upon defeat, Sui-Ki expresses curiosity towards Hito-Shura in his last few breaths, openly wondering if he's a demon or a human.