Gremmy Thoumeaux is a Quincy and a member of the Wandenreich's Sternritter. He has the ability to turn fantasy into reality. During Wandenreich's second invasion Gremmy fights against Zaraki Kenpachi. Gremmy tries to destroy Seireitei by imagining a meteorite falling on it. He succeeds in crushing the Shakonmaku, but the meterite is stopped by Kenpachi's shikai.