Gla-Thon openly spoke about how she remembered when the Gnomes ruled Dread Mountain, and not the Ooze ToadGellick. Later, Gla-Thon and a battalion of gnomes pursued Lief, Barda, Jasmine, and Prin when they escaped from their trap. They cornered the companions, but before they could kill them, Lief and Barda convince the Gnomes to allow them a chance to kill Gellick in exchange for the gem on his forehead. While at first skeptical, Gla-Thon and the other Gnomes accept when Jasmine was saved from Gellick's poison through the power of the Ruby. She enters the treasury (where Gellick sleeps) with Ri-Nan and Fa-Glin to make sure the companions would not steal any gold. After Gellick's transformation into a tree, she welcomed the Kin back to Dread Mountain and bid the companions farewell on good terms.
Gla-Thon was chosen to represent the Dread Gnome tribe in the ceremony to find the heir to Deltora. She arrived in Withick Mire with one of the Kin, and later joined the resistance in rescuing Dain from Ichabod. She was captured and was to be publicly executed alongside the rest of the resistance, but escaped in the confusion caused by Lief.
Gla-Thon arrived in Del just as the Toran Plague broke out, preventing her from leaving the city. She injured Fidelis after he saved Lief from Paff's creature, thinking instead that the dragon was attacking her king (and later shows remorse for attacking him). When the Plague was revealed to be poison, Lief had her send word to Dread Mountain to bring its emeralds and amethysts to test and cure poisoned food and people. After Lief discovered the Sister of the South and summoned Fidelis, Gla-Thon arrived to warn him of the townspeople rallying to kill the dragon. She was attacked by Paff's creature, but Lief drew its attention from her by jumping into the pit containing the Sister of the South.
Gla-Thon has a deep respect for the Dread Gnome's ancestry, and wasn't afraid to openly speek about it in the presence of Gellick. She is well trusted by her people, as she was selected to represent the Dread Gnome Tribe in Withick Mire. She also has a natural love for treasure, and a strong sense of honour.
Gla-Thon was one of the first Dread Gnomes willing to collaborate with Lief, Barda and Jasmine in Dread Mountain. After Lief became king, Gla-Thon was very loyal to him even though Lief thought he had deceived everyone including Gla-Thon when he told there was no Toran Plague. Gla-Thon even risked her life by shooting Fidelis with her bow when she thought he was attacking Lief.