Shion Zaba, a hunter from Baran-Baran in Byston Well, is captured alongside Princess Remul Jilfird during Rabaan Zaramand's conquest campaign. He engineers an escape from imprisonment with Remul, aided by the fairy Silky Mau. Their return to Baran-Baran reveals the nation's legendary treasure is the powerful aura battler Sirbine, which Shion pilots against Rabaan's army.

Shion possesses brown hair and wears a distinctive lilac bandage across his forehead. His typical attire features ornately decorated suits, and he carries a family sword at his side. His personality includes a strong masculine self-perception, discomfort with female superiority, and persistent dedication to skill improvement. These traits fuel his rapid advancement within the aura battler ranks despite recent recruitment.

Shion represents the reincarnation of Shō Zama, protagonist of the original Byston Well conflict 700 years prior. Remul embodies the reincarnation of Rimul Luft, while Rabaan mirrors Shō's former rival Burne Bannings. Silky Mau, previously associated with antagonist Drake Luft in the earlier war, now voluntarily assists Shion. This reincarnation cycle extends to secondary characters like Beraana Gariaha, who manifests Garalia Nyamhee's essence.

Shion's narrative trajectory follows his progression from captive to Sirbine pilot, confronting Rabaan's Zwauth aura battler and forces across strategic engagements. His operational connection to Silky Mau remains significant throughout these battles. The conflict escalates when antagonist Shot Weapon unleashes an ICBM nuclear strike threat targeting Byston Well, requiring intervention by Shion and allies to prevent catastrophic destruction.