Ralsei is one of the main heroes of Deltarune, the role playing game by Toby Fox first released in 2018 as a follow up in spirit to Undertale. The games use text boxes rather than voiced acting, so scream clips linked to Ralsei come from fan edits and meme videos shared online. Those edits, including scenes like Ralsei getting buried in sand, helped turn the sound into a shorthand reaction for startled characters, much like a jumpscare scream in horror edits.