Maruta Kinshii is a B-rank Maruta human and is mainly used for versatility purposes. He was experimented on by Maruta Ishii to have the abilities of a Den_Den_Mushi#Black Den Den Mushi and a Den_Den_Mushi#Horned Den Den Mushi which was successful. Because of this, Maruta Ishii uses Kinshii as a tool to intercept calls from Marines and Pirates alike to gain information.
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