Jiruo is an instructor at Beruchoro Orphanage. Jiruo is a Moon/Purple Whistle, putting him one rank below Black Whistles and allowing him to be an instructor for future cave-raiders. Jiruo's mentor was the legendary White Whistle, Lyza The Annihilator, and has known Riko since she was a toddler. Jiruo is a competent and strict instructor, never allowing the eager Red Whistle Riko to exceed the depth allowed by her experience. When the children break the rules or behave unruly, Jiruo will knock them on the top of the head to put them back in line. Despite his role as instructor, Jiruo cares for the children at the orphanage and is concerned for their safety, protecting them from the horrors of the Abyss as best as he can.
Made in Abyss
The enormous cave system, known as the Abyss, is the only unexplored place in the world. Nobody knows how deep down goes this titanic pit, inhabited by strange and wondrous creatures and full of mysterious ancient relics which purpose in unknown to modern man. Generations of bold adventurers have been drawn by the cryptic depths of the Abyss. In course of time those bold enough to explore the dangerous pit came to be known as "Cave Raiders." In Oosu, the town at the edge of the Abyss, there lives a little orphan named Rico, who dreams of becoming as great a cave raider as her mother was and solving the great mystery of the pit. One day exploring the murky depths she stumbles upon a little boy, who turns out to be a robot...
