Cyda is an NPC from Final Fantasy Tactics A2: Grimoire of the Rift. She was given Zombie Powder too from Duke Snakeheart. Maquis sent out to help her, and in exchange for his memories was given a cure for her from the Witch of the Fens.
She posts a bill in the pub saying that Maquis left her and mentioned something about a snake, who turns out to be Duke Snakeheart. In the end when Duelhorn begins to leave at the Moorabella aerodrome. She asks Maquis to come with her, but he refuses. It is revealed that she is a viera White Mage.