In Neo-Human Casshern: Braiking Boss is the leader of the renegade robot army threatening to conquer the world. He faces the combined forces of Casshern, Luna, and Friender in combat. In Casshern: Robot Hunter: Braiking Boss is the leader of the NEOROIDS that have taken over Earth. Casshern wages a solitary war on the NEOROIDS. Ironically Cassherns father created both Casshern and the NEOROIDS. In Casshern Sins: An enigmatic and scary man from Casshern's past, Braiking Boss once was the leader of robot army and commander of Casshern. Hundreds of years ago, Braiking Boss was a person who held the whole humanity under his iron-clad rule. Robots reigned over humans till the moment when humans summoned Luna, a messiah and savior of humanity. Braiking Boss, fearing his own demise and humanity's revolt, orders his three best soldiers to find and kill Luna. After the world destruction, Braiking Boss changes his name and is now wandering in the wilderness, tracking and following casshern. He is responsible for the ruin of the world, and the only thing he has left to wish for is to "settle the score" with Casshern.
Mikogami is a mysterious exorcist who is an old friend of the bus driver (and having the same creepy eyes as the latter) and the headmaster of Yokai Academy. He is always seen hooded beneath his garments and possesses extremely strong, anti-demonic powers, having the ability to seal Tsukune's ghoul nature using a "Holy Lock". He also has enough magic to create other dimensions sucha as the paradise he created for unstable and endangered beast-monsters. Mikogami is, in fact, one of the Three Dark Lords (三大冥王 Sandai MeiŌ?), the founders of Yokai Academy, and the ones who placed a barrier separating the human world from the supernatural world. He carries the Rosary of Judgement, which is used to make barriers, and is also aware Tsukune is human, but allowed him to stay at the academy in exchange for helping force out Hokuto, the Anti-Schoolers' leader. He seems to also be immortal (or at least in possession of very strong regenerative abilities), having been severely wounded (impaled in the back by the leader of the Anti-Schoolers) but recovering after. He is also very dedicated to the cause of coexestence asking Tsukune to stop Hokuto from starting a slaughter between humans and monsters. Though a powerful Dark Lord, Mikogami's sealing and barrier spells are apparently weaker than his fellow Dark Lord that taught him the sealing and barrier techniques, Touhou Fuhai.
A reporter who writes for the Tokyo Incidents. featuring weird events or noteworthy societies in Tokyo. Because of a planned special he comes to Ikebukuro with the intention of doing research on various topics such as who is regarded to be the strongest on the streets. His daughter is Niekawa Haruna.
The first of Faust's Saber Dolls. She is roughly the equivalent of Lime mainly in speed and agility but not nearly as naive. Of the 3, she shows a fiercer devotion and love for Faust and would die for him. (Source: Wikipedia)
Kuu is the youngest Haibane in the older group, having only been at Old Home two years more than Rakka. She is seemingly full of boundless energy and is nearly always cheerful. Rakka and Kuu became close friends shortly after Rakka arrived at Old Home. Kuu confides in Rakka that she had wished her to be a younger sister but was happy that Rakka wound up being older than her since she would have been placed with the younger group otherwise. Kuu is curious and enjoys trying out different things, which can sometimes result in disaster. She tried Reki's scooter and crashed into a telephone pole, and when she tried Hikari's glasses she became dizzy and fell down the stairs. She occasionally works at a cafe in town and is seemingly paid in sugar cubes.
O the Bounts, the antagonist race in the Bount arc. Sawatari seems to be the oldest Bount, but this is merely a by-product of his eating habits. He has been consuming living souls for far longer than any other Bount, causing him to age. He wears a black suit, with a light purple garment underneath. When fighting, Sawatari seems to think of his opponents as mere children, similar to Shigekuni Yamamoto-Genryūsai. But he seems to be power-hungry like the rest of his tribe, and wanted to overthrow Kariya as leader of the Bounts.
Another of Faust's Saber Dolls, equivalent to Cherry. Uses projectile weapons and is not above manipulating and deceiving her comrades for her own benefit. She has a very mysterious and aloof personality but has been known to act silly on certain occasions. She also has the same kind of advanced sensors as Cherry. Her name means Lynx in German. (Source: Wikipedia)