She first appeared alongside the other new Deboth Army generals to make their introduction to the new Kyoryugers. However, before they could attack, the Kyoryugers were escorted to safety by Zyudenryu Bragigas.
Back at their base, Hoshigallon was present when Gaos revealed to his subordinates a piece of Deboth's cells. Gaos then instructed them to gather the emotions of self-loathing, regret and envy, as they were needed to revive Deboth.
Hoshigallon and the other Deboth Army members soon ambushed the Kyoryugers again and managed to incapacitate them all, including their mentors, Candelilla and Luckyuro. Just as they were about to use the negative emotions they had collected to revive Deboth, Arslevan backstabbed the other members of the Deboth Army and revealed himself as the embodiment of Deboth's regret, before opening a dimensional gate and using it to travel back in time to prevent Deboth's death.
Later, following Arslevan's defeat, Hoshigallon, Gaos and Sneldo revealed to the Kyoryugers that they were still alive before fleeing.