Mantisian

Mantisian carries a flat, crab-shaped head atop an upright, brawny humanoid frame covered in muted yellow skin, and his eyes flip between crablike and human depending on the moment. Outfits change often, but the boxing gloves stay. Disguised as a human, he looks like a stern-faced middle-aged man topped by a hat molded after his own head. In his days serving the Serpo he wore only a speedo paired with a tie.

Mantisian is a layered figure. At first he reads as a chatty, combative fighter who sings and brags about his amped strength while trading words with opponents, and he bowed and apologized often to his Serpo employers. Counted as feeble by his species' measure, he has endured a brutal life: his wife died of a hereditary disease she passed to their son, Chiquitita, whose ongoing blood transfusions force Mantisian into perilous work. Scorned by his own kind and mocked by bosses, he was moved to tears when the Family tended his wounds, fed him, and promised a cow for his boy, swearing then to help them. He calls himself a pacifist and would not teach Okarun to punch, though he admits he hits back when pushed, as when riders nag his driving. He tacks deisu onto the end of his sentences.

Born on a watery world, Mantisian lost his wife to illness and, with his son inheriting it, sought money for transfusions; being weak by his race's standards, he ended up hired muscle for the Serpo. As the Dover Demon he battles Momo, Okarun, and Aira during the Serpo's bid to seize Okarun, but collapses afterward from his wounds. The teens nurse him, feed him curry, and Seiko gifts a cow whose milk matches his species' blood, moving him to abandon the fight and later settle on Earth with Chiquitita. He grows into an ally, repairing the Ayase home, ferrying the group, and joining their stand against the Kur. Facing the Mantis Exosuit Kur, he is battered until he lures the duel into a river, and there his Dover Demon change, the Strong Style Twenty-Four mode, lets him land a Jet Punch that destroys the suit.