Dergardo (デルガド) is an optional playable character in Zill O'll who can join the protagonist. He is one of the earliest possible party members who can be recruited with minimal effort. Completing his events rewards the protagonist with the Crimson Blaze Sword (緋炎の宝剣), a rare weapon exclusive to his character arc. The dwarf is a famous blacksmith whose weapons and armor are favored by many, and he is praised as the greatest of his craft in all of Vyashion. The populace honors him with the nickname "The Fire of Swordsmithing" (炎の刀工). He is 162 years old at the start of the game.