Ralsei is is a prince of the Dark World and one of the characters of Toby Fox's indie role-playing video game DELTARUNE released in 2018 where the player controls a teenage human Kris who is destined to save the world with Susie and Ralsei. Ralsei is a major character in the DELTARUNE Chapter 2 and is one of three who were prophesized as Delta Warriors. Ralsei is a Darkner, a species unknown to humans or monsters that inhabit the Dark World and keepers of Dark Fountains within it. Ralsei is a trusting and optimistic Fluffy Boy, often to a fault. He believes with all of his heart that a person can be good, and seeks for peaceful solutions. A fanart Undertale and Deltarune progress bar for YouTube with Ralsei Overworld Pixel.