Michael Kaiser Momobami

As a student at Hyakkaō Private Academy, he wears the male uniform, which consists of a red blazer with black sleeves and black plaid trousers. Underneath the blazer, he wears a white shirt and brown loafers. He also wears a black tie.

She likes to call the academy her aquarium and enjoys observing how people behave when they're at their lowest point and have to fight to reach the top. Winning or losing doesn't matter to her; she simply craves intense emotions, and this masks all her other feelings. Kaiser often bets everything she owns, and because she takes so many risks, the results always favor her. Being an incredible gambler, she shares many similarities with Yoichi Jabami, as Kaiser also gets excited about the extinguishing of the last spark, when a person's life comes to an end, and states that she enjoys watching people suffer because of their bets, plotting their lives, and appearing overly confident of winning. Sae describes her as a very selfish person who believes all her desires will be fulfilled, so she's willing to risk everything to make them a reality.

Official Battles (公こう式しき戦せん Kōshiki Sen) are an exclusive right granted to students with the Pet rank. These students can challenge any other student in the school to a wager, which, depending on the amount, is usually impossible to refuse. Pets can even challenge a Guild member, as even they cannot refuse the challenge.

It is said to be the only advantage of being a mascot. Meguru Bachira used this right to challenge Gagamaru to a duel to the death, but lost, further increasing his debt and consequently acquiring a life plan of his own. Yoichi Jabami's plan was to use that right to challenge Kaiser to a duel, but he changed his plans and challenged Rin. In addition to having his mascot status revoked after his victory, he also won nearly 3 billion dollars, the estimated value of Rin's life, and a life plan in his name, which he gave to Itsuki Sumeragi.

A formal match is the only right granted to a house mascot. A mascot has the right to challenge anyone to a match only once. If the wager is reasonable, it cannot be refused. It is tradition for student council members to accept challenges with no maximum wager limit. Sometimes, house mascots challenge them to a major match.

Hyakkao Private Academy. This prestigious school has a hierarchy. It's not grades or athletic prowess that get you to the top. Only your skills at the game, nothing else.
At Hyakkaou Private Academy, the student council regulates gambling. Its members are known to use their considerable influence to collect money from students. This payment, called a "donation," is optional but practically mandatory.

Hyakkaou Private Academy has a ranking system applied to students who haven't contributed financially to the school. Those in the top 3,000 students or who have accumulated a massive debt they can't repay are considered "pets." Male students are called "dogs" (pochi), and female students are called "cats" (mike). The hierarchy at Hyakkaou Private Academy is absolute; no student can challenge it, and if they do, they will face retaliation from the student council. If a student wants to escape their "pet" status, they must contribute, but this is impossible if they have a massive debt to repay or no money to get out of that situation. The hierarchy is described as a perfect dead end, from which students know it is extremely difficult to escape.

Two years before Yoichi Jabami Isagi entered Hyakkaou High School, Kaiser became student council president as a first-year student after winning a bet against the previous president. He was the one who created the pet system, with its donations and the "dog" and "cat" system. His victory intensified the existing discrimination at Hyakkaou Private Academy, increasing the oppression of those with little skill at gambling. Kaiser also took an interest in Alexis Ness, then a third-year junior, and chose him as his secretary.

Kaiser is shown as a very polite and well-mannered gentleman, who, until now, has loved to see how other people bet what is most precious to them (being the dealer in the meeting between Rin Itoshi and Yoichi, and in the confrontation between Chigiri Hyoma and Yoichi).

He is very calm, as shown when, even though almost the entire Council has been defeated by Yoichi, he doesn't seem to care much.

Momobami (Main)
Obama
Totobami
Innbami
Yobami
Warakubami
Komabami
Mushibami
Honebami
Jabami
Batsubami

Being the creator of the infamous pet system, where he deliberately fosters mistreatment, bullying, and inhumane conditions for other students, also reveals his sadistic side. Kaiser has no respect for human life and simply pursues his own interests. In fact, he doesn't care much for himself either, believing that as long as the journey is entertaining, the outcome doesn't matter. Upon assuming his position, Kaiser created a hierarchy that turns students with the largest debts into pets. With each victory he achieves, he develops an ever-increasing interest in, respect for, and admiration for Yoichi.

He is also very possessive and affectionate with his personal assistant, Alexis Ness, whom he admires for his exceptional logic.
Ness seems intriguing and overly rational to him; he feels he cannot understand him because he values ​​reason and is driven by reason, and even with a mind free of desires and facing death, he chooses reason, considering him his perfect opposite. He likes Ness as he is.

Kaiser's favorite foods are McDonald's, donuts, and coffee, but he never finishes his food. He'll try to drink as many cups of coffee as he can if he's allowed, just for fun.
He doesn't know how to react when he's given a gift; it frustrates him.
At barbecue restaurants, Kaiser orders kimchi and octopus. He likes sweet and spicy food. He doesn't really like meat and only eats chicken.

Although Kaiser appears to be a refined and proper gentleman, she is actually a calculating, manipulative, sadistic, and twisted individual who only cares about herself. Completely narcissistic, she looks down on everyone except herself, believing that everyone should follow her rules, as when Meguru Bachira rejected her invitation to join the student council; she simply ridiculed any reason she might have given, calling it absurd and illogical.

Observation skills
Determination
Influence
Charisma
Eloquence
Leadership
Disguise skills
Intimidation
Leadership
Deception

He is the current supreme leader of the Momobami clan, a conglomerate of several rich and powerful families allied with the family of Yoichi Jabami (Yoichi Isagi).

Kaiser is a tall, quite attractive young man. He has blue eyes and blond hair. His hairstyle includes a mullet with blue highlights at the ends, with two bright blue rat tails at the ends. His eyes are accentuated with red eyeliner. He has a tattoo of roses and thorns that extends from his neck, down his left arm, and down to his hand. At the end of his hand, he has a crown with a keyhole and three stars.