Riruka
Dokugamine

Riruka Dokugamine is a Fullbringer and a member of Xcution, introduced as the loudest and least cooperative person in a group already short on trust. She is a teenage girl in pigtails and a rabbit-eared hat who fills her room with soft toys and refuses to explain herself to anyone.

Her Fullbring is Dollhouse, and it runs on affection: anything she finds cute can be pulled into an object she has chosen, at whatever size she decides, and she controls what happens to it in there. That is how Ichigo Kurosaki spends part of his training inside a fish tank being attacked by a doll, and it is a genuinely dangerous ability disguised as a tantrum. She insists throughout that it is a power of love, and she is not being ironic.

What the arc does with her is quieter than the fight. Riruka joined Xcution because a Fullbringer has nowhere else to go, and Kūgo Ginjō's plan required her to help train the person he intended to rob. When it collapses, she is the one who ends up inside Rukia Kuchiki, taking a strike meant to kill her, and afterwards she cannot bring herself to admit that any of it mattered. The series lets her walk away without a speech, which suits her better than one would have.