The mesmer in Confessor's Stronghold?
She’s discussed quite a bit in this other thread here.
Also, the Mesmer Collective doesn’t seem to actually be secretive – they openly send out agents (Kasmeer to the Tower of Nightmares) and a PC mesmer casually mentions it to Braham in S2, and even he knows about it – but it was never openly brought up to Braham before.
They do keep secrets, but they don’t seem to be secretive.
Dear ANet writers,
Stop treating GW2 as a single story. Each Season and expansion should be their own story.
Stop treating GW2 as a single story. Each Season and expansion should be their own story.