Riko is an only child whose mother, Lyza "The Annihilator," was a legendary white whistle—basically the elite rank of cave raiders. Lyza vanished during an expedition to the Abyss's deepest levels when Riko was just two years old, leaving her to grow up in the Belchero Orphanage. That experience shaped her ambition: she's determined to become a cave raider herself, reach white whistle rank, and eventually finish what her mother started.
By twelve, Riko earned her apprentice certification and the red whistle that comes with it, clearing her to explore the Abyss's upper layers. She's the type of kid who approaches everything with genuine curiosity and energy, methodically researching whatever captures her attention. What makes her effective in the field isn't combat prowess—she's not a fighter—but her ability to stay calm and think clearly when things go sideways. Paired with her companion Regu, she's managed to survive encounters that would kill most people. She's also surprisingly skilled at cooking, which comes in handy when you're stuck underground for days at a time.
Stubborn and resilient are probably the best ways to describe her. She bounces back from setbacks that would break most kids her age, and she doesn't quit when things get hard.
Content compiled by AnimeList.moe from publicly available sources.
