Viv says in an interview that The Speaker is like a Phoenix, and not a member of the Ars Goetia.

A PHOENIX!!! A PHOENIX!!! SHES A PHOENIX?!?! ON BRAND!!!
😍😍😍😍😍😍
There is a ship name here somewhere, I know it!
#FirebirdSuite or #Firebirds
#PhoenixFlame
#ImmortalFlame