Ishai

Ishai, Ojutai Dragonspeaker is a legendary aven monk from Tarkir.

Ishai is the personal attendant of Ojutai, a wise and ancient dragonlord of Tarkir. Ojutai has had many heralds and holds no personal attachment to any of them, but Ishai's years of service have gained her a great deal of autonomy and authority. Ishai's word carries the full authority of Ojutai, and she demands the full respect of her clan.

It was Ishai that informed Narset that she was deemed worthy to be taught by Ojutai himself.