- Voice Actor (CV)
- Miyu Tomita
- Gender
- Female
- Age
- 12
- Role
- Protagonist
- Identity
- A Cave Raider from Belchero Orphanage in Orth, initially ranked as a Red Whistle before ascending to White Whistle status; the biological daughter of the legendary White Whistle known as the 'Annihilator', Lyza
Personality
Insatiably Curious
Unbreakable Willpower
Encyclopedic Knowledge
Relentlessly Optimistic
A young girl raised in the town of Orth who harbors an unwavering dream of following in her mother's footsteps to become a White Whistle. Her destiny shifts when she encounters the enigmatic robot Reg during an expedition, setting her on a courageous journey into the bottomless chasm known as the Abyss. Despite her physically fragile constitution, Riko's vast reservoir of knowledge and indomitable spirit allow her to guide her companions through the Abyss's layered curses, revealing a remarkable capacity for survival and leadership.