Glos belongs to the Xenos, intelligent monsters capable of human speech and emotions, introduced in Season III. Originating from the Dungeon, he shares their collective aspiration for peaceful coexistence with humans on the surface. He actively participates in the Xenos' engagements with Bell Cranel and the Hestia Familia, including their initial encounter and the alliance formed to defend Wiene and fellow Xenos against the Ikelos Familia's persecution. Glos also takes part in the Xenos' relocation initiatives and skirmishes with adventurers throughout Orario.