Gi Delilas and his siblings, Lu and Che, ambush the Ra-Seru heroes within Koru's chamber in Nivora Ravine as they prepare to set off the TimeSpace Bombs to blow him up. Keeping with the Delilas Family tradition, the siblings challenge the heroes one-on-one. After Che and Lu are defeated by Gala and Noa respectively, Gi plans to avenge them by defeating Vahn in a one-on-one battle.
Gi Delilas attacks in a set pattern like his siblings (attack, attack, special attack). His physical combos are 6 hits in length and do moderate damage. His special attack, Blazing Slash, can do 700+ damage to an un-Spirited Vahn, and about 350+ to Vahn with Spirit. Because Gi is of the Fire element like Vahn, both Gi's attacks and Vahn's attacks do relatively low damage. Additionally, Gi has the highest UDF and LDF of the siblings. This makes the battle take longer than the battles against Lu and Che.
Vahn should be equipped with a Defender Chain, an ATK increasing item, and a Burning Jewel. He should usually be faster than Gi, so speed is not a problem. At the start of battle, Vahn should use a Fury Boost. Vahn should continuously pummel Gi with the strongest Arts possible (usually Hyper Arts at this point), and can even attack without a need for Spiriting on the third turn - provided he is equipped with the recommended setup and his HP is above 380+. Vahn only needs to heal when health is critically low. Attack should be the main focus and Gi will go down after a while.