Riku was born in the slums. He lived there for a few years with his mother, Viiri, and a few other humans, until Segyeins found them and burned down their shacks. Viiri tried to escape with Riku, but sadly, she was killed.
Riku was taken, along with some other young children, and sold off. The Segyein Riku was sold off to was Unil. At first he was treated badly, but after many cases of fainting, Unil's wife, Sija, cared more for him.
During his time in Anakt Garden, he was a very social and outgoing pupil. He could easily tell who was more introverted and who was lonely, which is how he tried to get acquanted with Eunseo. From his point of view, they became pretty good friends. He noticed Eunseo disappeared without a trace sometimes, but Riku didn't think much of it.
After Round 3—after Eunseo died—Riku felt... a strange sense of emptiness. Sadness. Guilt? ... Whatever it was, it didn't matter. Unil was proud, Sija was proud, he grew in fame, but Riku didn't feel anything in return.
Riku lost and died in Round 6.
| Vocal | 3.0 |
| Strength | 3.5 |
| Talent | 3.0 |
| Mental strength | 4.0 |
| Star potential | 2.0 |
| Visual | 3.5 |