•× Gyokko ו

Appearance: Gyokko had a very bizarre and grotesque physiology, taking on the form of a pale white, abstracted, grotesque humanoid figure with a muscular upper torso that has no arms and resembles that of an armless statue growing from a porcelain vase, similar to a djinn. His midsection is a red-violet color while his lower-half, or his tail is black. He also possessed thin fins on the top and back of his head that were akin to hair, which were of a blended hue of purple and blue-violet color and shaped in the style of cornrows and a ponytail.

Gyokko's face was even more distorted, with large green-lipped mouths located where one would expect his eyes sockets to be located, which always displayed his hyperrealistic teeth and sometimes had one of or both of his tongues sticking out. His actual eyes were located vertically from one another on his face; one eye appeared in the constantly open bottom mouth and the other was seated at the center of his forehead. Three dots were on top of the latter eye. The kanji for 'Upper Rank' was engraved on his forehead's eye and the daiji for 'Five' was engraved on his mouth's eye. In addition, his twin green mouths are generally expressionless and only move when speaking or eating, while the mouth that displays his lower eye is the one that contorts to display Gyokko's emotions.

When in battle, Gyokko was shown to molt and transform into his true form, which bore heavy resemblance to that of a merman. In this state, Gyokko retained his facial features and muscular physique but now possessed a more humanoid body covered in transparent scales akin to a fish He also grew much larger, attains a mane of longer fish tail-like hair, dark markings on various places around his body, webbed hands with turquoise blue scales, and a long serpent-like tail in place of his legs. In addition, the mouth which displays his lower eye has 4 stitches, with 2 on each side, giving it a rag-doll like appearance.

Also, he's got two dicks 😈😈

Personality: Gyokko was shown to be an easily excitable demon, constantly fawning over new inspirations for what he deems his "art" or what he finds to be sublime, sometimes even going against his initial impressions. He was easily swayed into euphoria whenever Muzan was involved, trying not only to please him, but finding joy in being decapitated and having his head held by Muzan. Although he was dismayed he would have to work together with Hantengu, he nonetheless reasoned it was fine since Muzan ordered it. He also seemed to be somewhat sardonic and condescending; upon sensing Akaza's presence within the Infinity Castle, he almost let out his inner feelings to the demon about being glad he believed him to be dead before correcting himself mid-sentence, even if Akaza was not fooled by his false support.

Gyokko was also short-tempered, shallow, and arrogant, especially when it comes to things regarding his "art", as seen when he was easily enraged by Muichiro when the latter began to insult and make fun of the quality of his art to the point of bleeding from his blood vessels out of sheer fury, and through his conversation with the Hashira, constantly praised himself as "beautiful" and his work even more so, further reinforcing his arrogant and narcissistic personality and even insulting Muichiro as an "ape" for not appreciating his art. His arrogance was most prominently displayed after he was beheaded by Muichiro Tokito, referring to the Mist Hashira as an inferior and lower life form while calling himself a superb and chosen being.

Gyokko revealed himself to be incredibly petty and jealous, as seen when he attacked and mutilated Hotaru Haganezuka due to his jealousy of the latter's focus and dedication to his work, surpassing his own zeal when working on his own art and made him want to instead make the latter lose his focus and waste time on the swordsmith due to this petty jealousy.