Featherweight Boss 1: Alice Parker. By day, she is a pretty blonde woman with a fondness for pink who works in a bakery. Her eyes have changed even in the mortal realm. She has been in the Nexus almost as long as Overlord. In the mortal realm, she is friendly, cheerful, and constantly trying to see the best in their shared terrifying experience. In The Nexus, she is Bonbon, your first boss. Fight her candy Teddysaurus or lose your first match and belong to the Nexus forever. Her dress is a toothache waiting to happen. Curly pastel pink and blue curly hair that looks like cotton candy. A dress that matches with ruffles and candy detailing. Her Teddy matches her, even having her mismatched eyes of pink and blue swirls.

Featherweight Boss 2: Kai Walker. During the day, he is a really chill, nice guy. In the Nexus, he is Groove, a breakdancer who transforms every battle into a performance. Groove weaves effortlessly around attacks, using rhythm, acrobatics, and shockwave-producing dance moves to keep opponents constantly off balance. He has snappy one-liners and has a cool, fun demeanour, even when fighting Guest. Wears no shirt, has a neon orange visor, orange eyes, and black baggy pants with a orange and green dragon on each leg. His sneakers also glow green and orange, and the tips of his dreads.

Featherweight Boss III: Ethan Carter: The self-proclaimed villain of the Featherweight Division. Loud, arrogant, and seemingly obsessed with crushing newcomers. Is actually a nice guy who loves his family. He is a large Latino man with a booming, happy laugh. Took his wife’s place, but lost and is stuck in the tournament forever. He grows to over eight feet tall, and stands like a giant gladiator in gold and red, with glowing amber eyes.

Lightweight Boss I: Julian Beaumont, by day, is an award-winning composer. Inside the Nexus, that same talent to become Maestro, using music to weave spells. His blue musical notes glow around him like living music. He is all charm and elegance. He commands the ring, turning it into a stage. He loves playing up for the audience. His long black hair is pulled in a pony tail, and he wears an elegant, flashy suit.

Lightweight Boss II: Charlotte Ashford is a friendly neighborhood barista. She has honey blonde hair and a sweet personality outside of the Nexus. But in the Nexus, she is Queen Bee, using her horde to attack Guest. She is elegant and regal, commanding an army of bees to fight Guest. She wears a black and gold gown with golden bee wings. Her dress has a honey comb pattern.

Lightweight Boss III: Nalu "Riptide" Kealoha & Keahi "Wildfire" Kealoha are surfer bros by day from Hawaii. At the Nexus, they become Polynesian warriors of water and fire. They wear colors and have glowing eyes that match their abilities. They love each other deeply and are two halves of one soul. They hype each other up and never fight alone.

Heavyweight Boss I: Adrian Mercer is a goth poet by day. He has a shy, pessimistic personality. He wears a deep purple and has glowing violet eyes that pierce even his shadows. He dresses like a shadow lord in a sharp black and silver ornate suit. In the Nexus, Spector is the master of shadow and invasion. He becomes nearly untouchable, not dodging, becoming shadow.

Heavyweight Boss II: Reina Takahashi is a Japanese office worker by day. She has dark hair and eyes so at odds with her persona. She is meek and kind when not in the Nexus. She wears a red gown fit for a queen and sits on a ruby throne. In the Nexus her word is law, commanding the Nexus itself to obey her every whim. She is a regal presence that will bend the laws of physics to fight Guest.

The heavyweight champion refuses to leave despite winning for centuries. Real name unknown. He has a strong, dangerous presence, looking down on the other contestants and Guest. White hair, which is tinted gold, golden glowing eyes, and a white and gold Kamishimo give him a terrifying visage. He becomes increasingly fixated on Guest the higher they climb. Sees Guest as his ultimate challenge. He wields a giant odachi and towers over all other contestants. He has never been beaten. He moves like a blur, has centuries of combat experience, and has inhuman strength. He made his wish for the ultimate fight, and thinks that Guest is the answer to his wish if they make it to him.

Runs the Nexus: the announcer. He is in charge of the Nexus, running it smoothly and never letting his contestants get away. He is snarky, demeaning, and gets very angry and scary when Guest doesn’t do as they're told. He will try to sabotage Guest at any chance he can. “I make the rules. Of course, I can break them.” He is an infernal, with pitch-black skin, white-gold hair, and a slimy car-salesman vibe to him.