Sōgyo no Kotowari

This spirit takes the shape of two boys indistinguishable from one another, each with pale green eyes and silver hair drawn back into ponytails that spill into heavy bangs. They wear broad triangular blue hats trimmed with small red fans, layered court robes in light blue over beige hakama, and closed brown shoes.

While Muramasa's control holds, the twins are giddy and playful, forever laughing together and moving hand in hand, bearing their master no real malice even as they battle him. Beneath the cheer runs a sly streak, and they happily exploit Ukitake's gentleness, framing their attacks as nothing more than games.

Freed of the spell, they grow openly affectionate, obeying him, clambering onto his shoulders, and begging him to draw pictures for them, while the mere thought of returning to the sword horrifies them.

The twins wait with the other blade spirits in Muramasa's lair and take part in seizing Genryūsai Yamamoto, whose sealing is said to require the combined might of three Zanpakutō. When a Shinigami party breaks in, they reunite with Ukitake and turn their meeting into a game of thrown fans, unfurling a scroll that releases spinning bladed fans capable of loosing bolts of lightning. Their playfulness is a stall, but the ruse ends when Muramasa reveals that the whole rebellion was staged to claim Ryūjin Jakka's spirit.

Enraged, the twins attack him, only for Ryūjin Jakka's fire to burn them to nothing. Restored afterward by Mayuri Kurotsuchi, they rejoin Ukitake and later stand with other spirits against the last renegade blade, Kirikaze, surrendering their remaining energy to Renji Abarai before their materialized forms fade for good.