Guy Luna

David "Guy" Luna (デビッド「ガイ」ルナ Debiddo "Gai" Runa, born 2002) is a quiet and mysterious citizen from South City that knows more than meets the eye. He helps Brendan and Allison on how to enter the End dimension, and later on he informs Nick on future events. In his final appearance, Guy reveals his knowledge about the true forces controlling their dimension and implies that he has a hand in it.

In South City - Endings, it is confirmed that Guy is still alive but his whereabouts and true species are unknown.