Glasstaff

The name the Redbrands gave their leader — a wizard who ruled the gang from the cellars beneath Tresendar Manor and whose face none of them had seen.

Glasstaff is Iarno Albrek. The party learned it from the Spider’s own letter — “I’m counting on you, Iarno” — found on his desk the night they took him (Session 7). He is currently their prisoner.

Everything else about him is on his real name’s page: Iarno Albrek.