Wad'e Tay'haai was a Human male who was one of seventy-five Mandalorian warriors that were comprised in the Cuy'val Dar.
He was a member of the group who were a cadre of battle-hardened training sergeants hand-picked by Jango Fett to train elite clone commandos for the Grand Army of the Republic. Although most of the Cuy'val Dar disappeared after completing the terms of their contract following the First Battle of Geonosis, Jedi Master Arligan Zey later requested that several return to instruct clone troopers selected for commando cross-training such as the covert ops clone troopers. A reluctant Tay'haai eventually joined Mij Gilamar in accepting the offer, but they did so with ulterior motives, agreeing to assist Kal Skirata in his efforts to investigate the Republic's shifting strategies in the waning days of the Clone Wars.
Near the end of the Clone Wars, mere days after Order 66, Tay'haai left the GAR with liberated clones, a party led by Kal Skirata.
Wearing purple Mandalorian armor, Tay'haai wielded a traditional Mandalorian hunting spear known as a bevii'ragir and a bes'bev flute weapon.