Thousand-Faced High Priest Gaos is the new leader of the Deboth Army in the year 2114 and the secondary antagonist of Zyuden Sentai Kyoryuger Returns: 100 YEARS AFTER.
Gaos first appeared alongside the other new Debo Army generals to introduce himself to the new Kyoryugers. They prepared to attack them but before they could, Zyudenryu Bragigas escorted them to safety.
Back at their base, Gaos revealed to his subordinates that he had a piece of Deboth's cells, and that they can revive the deity by collecting the emotions of self-loathing, regret and envy.
However, during their next confrontation with the Kyoryugers, Arlsevan reveals himself as the true mastermind behind the Deboth Army's return and the embodiment of Deboth's regret over being defeated before opening up a dimensional gate so he can travel to the past and stop Deboth from being defeated.