Main Characters:Rex, the hero of the story; a hotheaded boy who has been expelled eight times before enrolling in his new college.Has a very short temper. Later in the series she loses her sight after a fight with the Evil Rabbit Gang Leader.a kind hearted person.He was killed by Judo Girl but was later revived by the Evil Rabbit Gang Leader but became paralyzed from his fight with Judo Girl.pervert who enjoys reading sexy girl magazines, especially Rex's Summer Fever stash.cute, she actually has incredible strength behind her right hand. She has a crush on Rex when he rescued her from a bunch of hooligans. She recently quarreled with her brother due to the fact he hasn't realized she is not a child anymore and constantly blames all the bad things that happened to Rex without knowing what really happened.
Main Antagonists:Ninja Masked Man, he is the sub-leader of the Evil Rabbit Gang. A highly-skilled expert in edged weapons and can use dark magic during combat, for instance manipulating his shadow to grasp opponents and release a dark shade through his palms into his opponent's eyes, like what he did to Eva (as seen in Fatal Chaos 3rd Strike). His official 1st appearance is in the 2nd book, Fatal Chaos Turbo EX.The Judo Chick, pawn to the Evil Rabbit gang. She is rival with Max and Phoebe, mostly because Phoebe has left the Evil Rabbit gang and the Judo Girl is now a sort of replacement for Phoebe's absence. After she disobeyed an order from her superiors in Fatal Chaos Turbo EX, she was punished by the Ninja Masked Man, then bestowed with dark powers by her superiors.Evil Rabbit henchmen, they are thugs working for the Evil Rabbit gang, usually attacking alongside their superiors against their opponents in large numbers. Most of the time they appeared they serves as a distraction while their superiors did all the attacks.Ninja Henchmen, they are two masked ninja warriors that appeared at the end of Fatal Chaos 4th Attack. They infiltrates Rex's home, which is nothing more than a dilapidated warehouse, bringing with them a number of Evil Rabbit henchmen. They tried to capture Rex, but failed.They appeared to be a couple - one of them is a man, and the other is a woman. The man uses a polestaff in combat whilst the woman uses a pair of blades attached to her wrists.
Special CharactersNina: She is a special character created in the Fatal Chaos: The Evil Rabbit Attack mobile game. She also appear in the promo mobile game comics in Fatal Chaos Turbo EX and 3rd Strike. She is characterized as an evil woman who has a hidden agenda and always mumbling complicated sentences which people do not understand. She is also an important member of the Evil Rabbit Gang. Gained a huge fanbase despite not being a major character in the actual comics.Whoever possesses his power become very very violent. Currently Rex, The Judo Chick & recently Max possess its power.Kristoff: Rex's mother from a long time ago. She was the previous host of Barbakov before passing its powers to her unborn son, Rex. In the last chapter, it was revealed that Barbakov chose to possess Kristoff as she has a pure heart and her pure heart would destroy the corruption in his powers.