Setsuna Tokage, a recommended student in U.A. High School's Class 1-B, stands 158 cm tall, making her the shortest among U.A.'s recommended entrants. Her distinctive appearance features dark green, wavy hair past her shoulders, a small clump hanging over her forehead, large upturned dusky green eyes with long lower lashes, and notably pointed teeth. Her "Lizardy" hero costume is a scaly, form-fitting bodysuit—originally navy-purple, later shifting to indigo and green—infused with her cells for regeneration. It includes a matching eye mask, black knee-high boots, fingerless gloves with wrist guards, and a belt with a jeweled center. As a pro hero, she dyes her hair blonde and adds a striped waist accessory.
Hailing from Saitama Prefecture, Setsuna wields the Quirk "Lizard Tail Splitter," enabling her to detach her body into roughly fifty independently controlled fragments that can float, scout, or attack, though each piece weakens individually. Her core (head and torso) retains control and can also float. Separated parts lose function if distant too long, requiring energy-intensive regeneration; she proactively recalls fragments to conserve stamina. This Quirk allows unconventional tactics like surveillance through disembodied eyes or communication via isolated mouths. Her combat style leverages fragmentation for evasion, distraction, and multi-angle strikes.
Confident and provocative, Setsuna displays strong leadership tendencies. She is strategically observant, adept at pinpointing opponents' weaknesses mid-battle, and holds no resentment towards Class 1-A unlike some classmates. Her middle school included a "gyaru" fashion phase and an emo phase, periods she rarely discusses. Interests encompass dinosaurs, paleontology, skateboarding, and drumming. She values cultural experiences from travel and enjoys Italian cuisine. Personal traits include warmth-seeking behavior, a split tongue, and fluency in Japanese with basic English. Her father, a paleontologist, possesses a skink-related Quirk; her late mother had a Utahraptor Quirk, her passing during Setsuna's childhood having a significant impact. She has a younger brother, Tatsuya, with a dinosaur-transformation Quirk.
At U.A., Setsuna participated in the Sports Festival's obstacle race (placing 39th) and cavalry battle, where her team was eliminated early. She later adopted the hero name "Lizardy." During the Joint Training Battle against Class 1-A's Team Bakugo, she devised a multi-step plan anticipating Bakugo's impulsiveness. However, his unexpected teamwork led to her defeat via his Flash Grenade, highlighting her reliance on meticulous planning over improvisation. She interned under Pro Hero Majestic alongside Momo Yaoyorozu, refining her predictive combat efficiency. Eight years post-Final War, she ranks as the No. 22 Pro Hero.
Her relationships include camaraderie within Class 1-B, particularly with childhood friend Juzo Honenuki. Neito Monoma praised her potential to rival top fighters like Bakugo. She maintained class communication via chat groups and social media. For the cultural festival play, she performed as an amazon character. Ultra Analysis stats rate her highly in speed, technique, wits, and disconnection (all A-rank), with average power (C-rank).