Fish Eye, a shapeshifting member of the Amazon Trio, begins as a fish mutated into humanoid form by Zirconia’s dark magic to serve the Dead Moon Circus. Named after apophyllite—called *gyoganseki* (fisheye stone) in Japanese—his aquatic roots permeate his identity. His civilian alias, Uokawa Nanami ("fish river" and "seven seas"), reinforces this theme. Androgynous features include vivid blue eyes, cascading wavy blue hair in a loose ponytail, and a pale-blue jumpsuit patterned with a pink fish skeleton. A gemstone glows on his forehead, complemented by elfin ears, scaled webbed hands, and heeled boots. In anime lore, Fish Eye hunts men using water-based teleportation rings, hypnotic male Lemures, and mirror traps to harvest dream energy. His arc pivots when unrequited feelings for Mamoru trigger an existential crisis, exposing his lack of a dream mirror. This revelation drives him to sacrifice his powers to repair Sailor Moon’s mirror, leading to his death and subsequent resurrection by Pegasus, who grants him a new dream mirror and life in Elysion. The manga and *Sailor Moon Eternal* frame him as a tactical operative under the Amazoness Quartet, exploiting emotional weaknesses. He ensnares Sailor Mercury by weaponizing her paternal abandonment trauma, imprisoning her in a mirrored nightmare until her觉醒 powers and allied Sailors shatter his scheme. Supplementary *Materials Collection* text hints at an unexplored aspiration: becoming a "famous ball balancer." His bestial form mirrors a lionfish—light-blue scales striped green, fins speckled with polka dots. Combat skills span water manipulation, illusory deception, and hurling knives. While the anime highlights his emotional complexity and redemption, manga iterations prioritize his role as a fleeting adversary fixated on mission success, offering minimal personal evolution.