Like Raul, he was undergoing the hero training program until it was shut down due to the demon lord being defeated. Like Blaze, he also says he plans on becoming a hero someday despite the lack of need for one. And like Blaze, he's part of the plot to turn Fino into the next demon lord.
A living sword similar to Grospoliner and Gesso. Unlike those two, it is an evil sword that thrives on suffering and completely controls its wielder. The only way to break its control is to have the sword deal a deadly blow to someone the current wielder/possessed one loves. Mana wielded the sword before the series, and Katsumi is possessed by it in the later part of the series. Kiddy's intervention broke the sword's control, but she survived thanks to her android nature.
One of four Pallasite Kings, the user of the Great Sword Tenjinsoseiken. He is calm and soft spoken, and apparently the most loyal of the four kings.
One of the four 'Coffin Knights' The four knights released from the coffins that Pazuzu attempted to keep hidden throughout Aegis of Uruk. Without Pazuzu, they have awakened and now roam the Tower without a master, attacking various climbers as they see fit. Gremica reveals that they are magical machines, created from the Dark Armour formerly used by the Sumar Empire (Red Knight, Blue Knight, Mirror Knight, and Hyper Knight) and their individual characteristics likely carried over. Henaro's motivation for climbing the tower is to recover the four knights by the orders of Amina and protect the king's shadow. (Source: Wikipedia)