Riko  

, リコ

Riko is Lyza "The Annihilator's" only child, who was born when she was two years old. Her mother went missing during a quest to the bottom of the Abyss, and after that, Riko lived in an orphanage where she studied to become a cave raider herself. By twelve years old, Riko had attained the rank of apprentice, which allowed her to wear a red whistle and explore the shallowest level of the Abyss. Her ultimate goal is to obtain the white whistle rank (the highest among cave raiders) and follow in her mother's footsteps to the bottom of the Abyss. Riko is an energetic, curious child with a quick mind who tries to gather information on topics that interest her. She is resilient and stubborn but not much of a brawler. Her ability to remain calm under pressure and make rational decisions during battles allows her, along with Regus's help, to overcome many dangers in the Abyss. Additionally, Riko has excellent cooking skills.