Originally introduced as Baroque Works Officer Agent Mr. 2 Bon Clay, Bentham (epithet "Bentham of the Wild") is an okama who uniquely held both a numerical and holiday codename. Initially antagonistic, he impersonated King Nefertari Cobra to incite Arabasta conflict and fought the Straw Hats, capitalizing on Sanji's weakness by shapeshifting into Nami. However, he formed a genuine friendship with Monkey D. Luffy. During the Arabasta Arc, he sacrificed himself by impersonating the Straw Hats to lure away Marines, allowing their escape, motivated by his "okama way" creed prioritizing friendship. Captured, he later escaped prison only to be recaptured and imprisoned in Impel Down. Reuniting with Luffy during the Impel Down infiltration to rescue Portgas D. Ace, Bon Clay became a crucial ally, aiding navigation through deadly levels and confronting hazards and enemies. He ultimately sacrificed himself to operate the Gates of Justice, ensuring Luffy and the prisoners' escape while confronting warden Magellan, declaring no regrets. He survived and later resurfaced as the new queen of Impel Down's Level 5.5 sanctuary, Newkama Land. Bon Clay possesses the Mane Mane no Mi (Clone-Clone Fruit), a Paramecia-type Devil Fruit allowing him to transform into an exact physical duplicate, including voice and features, of any person whose face he has touched. He cannot replicate clothing or wielded items and reverts if his left hand touches his face or if attacked while transformed. He uses Okama Kenpo, a martial art focused on powerful kicks and ballet-inspired acrobatics requiring his true form. Techniques include "Hakucho Arabesque" (Swan Arabesque), "Okama Dash," "Mascara Boomerang" (throwing bladed false eyelashes), and "Prima" (attacking with swan heads on his feet). His personality is defined by flamboyance, unwavering loyalty, and deep value for friendship, expressed through theatrical poses, expressive mannerisms, and catchphrases like "Jodan janai wa yo!" and invocations of the "okama way." Despite his antagonistic start, his capacity for self-sacrifice for friends, especially Luffy, forms his core development. He demonstrates leadership, inspiring prisoners during the Impel Down revolt and ruling Newkama Land. He often uses distinctive physical traits combined with "-chan" for nicknames (e.g., "Straw-chan," "Nose-chan").