Kateryna (カテリナ Katerina; Lit. "Pure") is a prototype for the current model of Pacifista that have been developed using Bartholomew Kuma's physiology. She was initially labelled Prototype V13 (試作 ブイ十三 Shisaku Buijuusan), until eventually named by a human Robin Goodfellow thanks to her appearance. Kateryna eventually developed a form of her own sentience, beyond that of the artificial intelligence provided to her. Likewise, Kateryna had been able to escape from her prison through Robin's own escape attempts, becoming the first official member of Monster Party alongside him. Her position is that of a Shipwright, and she holds a bounty of File:Bsymbol.gif20,000,000.