ONA
Description
In the comedic anime Ple Ple Pleiades 3, Cocytus is depicted as a Floor Guardian of the Great Tomb of Nazarick, specifically overseeing the fifth floor. His background as a disciplined warrior shapes his core personality, which is characterized by earnestness and a serious dedication to his duties. This seriousness, however, becomes a source of humor when he attempts to engage in overacting. Due to his inherent warrior setting, performing exaggerated or theatrical expressions is fundamentally impossible for him, leading to forced and unconvincing results.

Cocytus’s primary motivation in this installment stems from a misunderstanding. He believes that the trend of overacting originated from his master, Ainz, and feels compelled to emulate it to show his devotion. This drives him to repeatedly try and fail to perform what he considers cool and dramatic poses. His deep respect for Ainz is a key aspect of his role in the story, as he seeks to please the overlord by mirroring behavior he incorrectly attributes to him.

The relationship between Cocytus and Ainz is central to his narrative. When Ainz visits the fifth floor, Cocytus proudly demonstrates his overacting skills, only to be gently told that such behavior is unnecessary. The guardian insists that the style came from Ainz himself, leading to the revelation that the original performance was actually by Pandora’s Actor disguised as Ainz. Despite learning this, Cocytus remains unwavering in his admiration, passionately arguing that the real Ainz would be even cooler at overacting than the impersonator, and he perceives subtle, superior qualities in his master that the imitation lacked. This interaction highlights his unwavering loyalty.

Cocytus does not undergo a dramatic change in personality, but he does gain a clarified understanding of the overacting trend’s true origin. His development is more about reaffirming his faith in Ainz’s inherent greatness, regardless of who started the fad. His most notable ability in this context is a negative one: a complete inability to act in an exaggerated or theatrical manner. This limitation, born from his rigid warrior nature, is the primary source of his comedic struggle throughout the episode.