Riko is a curious and adventurous young girl from the anime series 'Made in Abyss'. She is an apprentice Cave Raider living in the town of Orth on the edge of the Abyss, a massive and mysterious chasm. Riko is determined to become a White Whistle like her mother, Lyza, who disappeared during an exploration. Her journey begins when she discovers a robot boy named Reg, and together, they descend into the Abyss in search of her mother and to uncover the secrets of the Abyss.