Raiden

Raiden (ライデン, Raiden) is a Super Sumo champion. He works as a hero for the Neo Heroes.

Appearance
Raiden is a very large and muscular man with black hair and dark eyes. He sports the traditional rikishi appearance, complete with a white fundoshi and a chonmage topknot haircut.

Personality
Raiden is adamant about not joining the current Hero Association. He instead gets contracted with the Neo Heroes.

Raiden is very confident about his strength, boasting about his legendary reputation and challenging Superalloy Darkshine to a sparring match.

He also seems to have an honorable and compassionate side however. As shown when he called off the spar because he noticed that Darkshine wasn't in proper fighting condition and didn't want to intimidate him. He also expressed some concern for Darkshine's safety, warning him to get out of the way when Mars Leo was going on a rampage.

History
When he was an active professional Super Sumo wrestler, Raiden fought and won 700 consecutive fights, becoming the Super Sumo Yokozuna and gaining a reputation as the strongest wrestler of all time. As a child he was a natural prodigy, having never lost a single fight or sports competition, even if he was facing adults.

Because of his incredible strength, he was visited by scouts sent by the Hero Association multiple times, with the request to join them and work as a professional S-Class Hero. He refused all their offers.

Psychic Sisters Arc
Raiden was once again approached by a Hero Association scout with yet another offer to join their ranks, but the yokozuna yet again refused their offer. This time revealing to the scout that he was already contracted with the Neo Heroes, which is a new hero organization that is set to replace the current Hero Association as the defenders of mankind.

Abilities and Powers
Raiden is known to have a "strength that surpasses knowledge", prompting the Hero Association to repeatedly invite him to join them as an S-Class Hero. His strength has also given him a reputation of having a body that goes beyond the realm of hominid, and grants him an overwhelming advantage over all biological beings.

McCoy stated that in terms of battle prowess, he's the top of the class. The Neo Heroes' assessment of him apparently suggests that his strength even surpasses the Hero Association's S-Class Level. Raiden momentarily sparred against Superalloy Darkshine on seemingly fair grounds, but Darkshine wasn't in proper fighting condition at the time. During his brief spar with Darkshine, they shattered the ground surrounding them.

One time while Raiden was on vacation, he swatted a large monster to death with his bare hand.

Trivia

 * Raiden may be a reference to the famous sumo wrestler Raiden Tameemon (雷電爲右衞門).