Ultraman Ace's History
Seiji Hokuto is the third Ultraman to appear. Initially an independent party who simply mimicked Ultraman to get his revenge on Ace Killer, Seiji eventually joined the SSSP as a full-fledged member.
At some point in the past, Seiji became friends with an extraterrestrial girl named Yuko Minami. Shortly afterwards he was in a plane crash that killed his parents and left him near death, although he was saved by Bemular. He was eventually taken in by Yapool and fitted with prosthetic limbs to replace his damaged organic ones.
Seiji was a young man of Shinjiro's age, going to the same school as the son of Ultraman. However, the two had never interacted in any significant manner until some time after Shinjiro became aware of his heritage. Seiji asked to meet Shinjiro after a class, where he revealed that he knew that Shinjiro was Ultraman, much to the latter's shock. m Later, Seiji ran into Shinjiro again, although Shinjiro received a call from Ide. Seiji used a device to trace the call, confirming his idea of Ultraman's identity. At some point after that, a man attempted to assault and rob him, but Seiji was capable of fighting and beating the man, who was left lying on the sidewalk.
Soon afterwards, Seiji tracked an emergency call, which he declared to be his first case before donning his own Ultraman suit. He quickly arrived at the scene, saving Shinjiro from a Biological Weapon, slicing the beast in half. Seiji's arms then exploded. Just as quickly as he appeared he left, but not before telling Shinjiro that he'd see him at school.
Returning to Yapool, Seiji was given heavy criticism for damaging his arms, but the alien agreed to repair them. He then beat Shinjiro and Moroboshi to defeating a second Biological Weapon in a subway system. After boasting, he tried to be allowed a job at the SSSP, although Moroboshi wanted to check his background. Seiji removed his helmet and explained himself.
The other two Ultramen took Seiji to the SSSP headquarters, where Moroboshi and Edo discussed his alien-designed prosthetics, which were untraceable. Seiji revealed that he had bought the identity of Ultraman from someone, but refused to say who. He was then released, making his way back to Yapool.
Yapool berated Seiji for revealing himself but admitted that they and the SSSP had the same goal in mind, but must keep their savior secret. Seiji agreed, stating that the reason he had been eliminating anyone who interfered with human-alien relations was due to their mysterious savior.
Shinjiro later caught Seiji extorting money from a man who ran a scamming business on the side. The two began to argue about Seiji's position as the "Hammer of Justice," whereupon he challenged Shinjiro to a duel. Using his modified simulation device, he summoned his suit and prepared to fight the suitless Shinjiro. Moroboshi interrupted the one-sided duel, beating Seiji's helmet off with his sword.
Later the young Ultraman arrived to help Shinjiro and Morobishi to defeat the Ace Killer Squad, who were in fact targeting Seiji himself. He challenged Ace Killer, where he managed to hold his own for a while. Eventually the assassin managed to sever one of his prosthetic arms, although Seiji exacted the same treatment on him afterwards.
Ace Killer then drew his hatchet and began to beat, batter and slash Hokuto in a flurry of blows. Seiji managed to recover and fight back, but was stabbed through the chest. He then tackled the mercenary and removed his left hand, revealing a powerful Spacium weapon. Ace Killer resigned himself to his face, and Seiji decapitated him with a blast to the face. Seiji then succumbed to his wounds and dropped into unconsciousness. Bemular then arrived, and carried the wounded young man to safety and to be healed.
Three months later, Seiji appeared with Bemular to save a group of people from an alien in a forest. They then went to New York to fight against the Star of Darkness. The two of them helped Shinjiro hold up a falling building, saving Rena and a group of citizens. Seiji then went to fight against the Star of Darkness' footsoldiers.
Some time later, Seiji was faced by Alien Zarab impostors posing as Shin and Moroboshi in their suits, and was defeated by them. Taro and the Leo Brothers were then sent in to help him.
