Veis is a viera Assassin in Final Fantasy Tactics A2: Grimoire of the Rift. She plays an important part in the Veis, Assassin quest and teaches Clan Gully the Assassin Job.
If one completes the Veis, Assassin quest, all quests undertaken involving House Bowen will have Veis as one of the characters with them. If not, it will only have Bowen, the nu mou Illusionist Tweigel, and the gria Ravager Loa.
Veis will often start the battle with Vanish to prevent her from taking damage and will then move away from the enemy party and attack, losing her vanish ability, giving an early advantage.