---wonderwice margera---Wonderweiss's personality is child-like and possibly even autistic. When sent on a mission to kill, he instead plays around with a dragonfly. He shows a bit of hostility, firing a retaliatory Bala blast at one point, but quickly reverts back to his regular state after doing so. He isn't able to speak clearly, only saying a few syllables at a time like a child would, and elongating his words. The only coherent sentence he ever speaks is his own name, immediately after being "reborn" as an Arrancar. Kaname Tōsen says that Wonderweiss, like himself, is a pure being (though he makes a point of wondering whether he is pure good or evil), which often tend to stick together, causing Wonderweiss to follow him everywhere when possible. For this reason, he tried to restrain Gin Ichimaru from getting closer to Kaname, as Wonderweiss was wary of him.
He shows high hostility by stabbing Ukitake through the chest but unlike before when he was after Kisuke's hat this was out of pure hostility (or orders) and showed some tact by freeing Tia Harribel.