Galdos Stouff served as the Jedi apprentice, or Padawan, of the Weequay named Sora Bulq. He accompanied Bulq in 22 BBY as part of the Jedi assault team dispatched to the planet of Geonosis. Their mission was to free the Jedi Knight Obi-Wan Kenobi from Separatist execution. During the battle in the Petranaki Arena, Bulq and Stouff overcame a dozen guards positioned in the stands. However, the Jedi suffered significant losses, and some days afterward, the Padawan Iskat Akaris noticed she hadn't seen Stouff since that conflict.
Galdos Stouff, a Force-sensitive Padawan of the Jedi Order, protectors of the Galactic Republic, was the student of the Weequay Jedi Sora Bulq. In 22 BBY, both Stouff and Bulq were chosen for an assault team. This team, consisting of 212 Jedi and led by Jedi Master Mace Windu, went to the planet Geonosis to rescue Jedi Knight Obi-Wan Kenobi. Kenobi was scheduled for execution after being captured while spying on the leaders of the newly established Confederacy of Independent Systems. Stouff and Bulq were sent to the stands of the Geonosian Petranaki Arena, the site of the planned execution of Kenobi, his apprentice Anakin Skywalker, and Republic Senator Padmé Amidala. The two defeated a dozen surrounding guards during the battle there, with Bulq eventually finding himself encircled by surviving Jedi on the arena floor.
The arrival of the new Grand Army of the Republic secured a Republic victory, leading to the rescue of Kenobi, Skywalker, Amidala, and Bulq. However, out of the hundreds of Jedi deployed to the arena, only twenty-nine survived, including Bulq. In the days after the battle, Padawan Iskat Akaris was in the Jedi Temple on Coruscant when she realized that she had not seen Stouff, or the Padawans Tan Yuster and Lumas, since the battle on Geonosis, and was thinking about the high number of Jedi casualties.
Within the current Star Wars canon, the first mention of Galdos Stouff occurred in the 2016 reference book titled Star Wars: Complete Locations. This information was sourced from Inside the Worlds of Star Wars: Attack of the Clones, a 2003 reference book authored by Simon Beecroft and Curtis Saxton. This earlier book marked the character's initial appearance in the Star Wars Legends continuity.