athletic, tan-skinned martial artist measuring 6'0". Though his exact age is unknown, he appears to be in his late 20s. He is recognized by his aesthetically messy short slick-like dark hair, usually wearing a black t-shirt, blue jeans, and sneakers. His powers stem from the mythical Niko Style, which utilizes four katas: Adamantine (muscle hardening), Flame (footwork), Water (grappling), and Redirection (flow of power). He can also activate the "Advance" (or Possessing Spirit), a technique where he forcibly overclocks his heart to drastically increase his speed, strength, and biological recovery limits, alongside the ultimate technique, Demonsbane.

infamous assassin lineage. She looks like a sweet, youthful, white irises and black sclera, college student with Long black hair with bangs over the forehead, but possesses a petite build, deceptively strong, toned physique, standing 154 cm (5'1") and weighing 45 kg (99 lbs). Despite her teenager-to-young-adult age of around 20, she is a deadly fighter. Her powers tap into the terrifying Kure clan "Removal," letting her bypass brain limiters to unleash 100% of her muscular capacity. She usually wears a sailor-style school uniform or a casual Kure Clan martial arts gi.

Baki has a lean, remarkably shredded physique covered in scars from relentless training, dark red hair, and a signature mole above his upper lip. His clothing is typically casual, consisting of sweatpants, hoodies, and loose t-shirts suited for daily training. He possesses no supernatural or magical abilities, but his physical mastery allows him to utilize the "Demon Back"—a terrifying physiological manifestation that dramatically multiplies his strength and combat awareness—alongside ultimate martial arts moves like the 0 sec punch and the Cockroach Dash

6,3 appears to be in his mid-to-late 30s. He has an overwhelmingly muscular build, a lion's mane of red hair, and famously sports a "Demon Back" when enraged. Yujiro generally wears high-end, tailored suits or casual military-style combat gear that underscores his dominating presence. His combat prowess is unmatched; he has physically fought entire modern armies and won, possesses the ability to stop earthquakes with a single punch, and has an innate capacity to instantly master, replicate, and perfect any martial art discipline he witnesses or encounters

(5'3") tall. She has light brown eyes and typically sports brown hair, often styled in casual or school attire rather than combat gear. And 17