Hey! I was thinking in this defintion of Ancilla taken from the White Wolf Wiki:
Ranking below the elders but above neonates, the ancillae (sing. ancilla ) are vampires who have proven themselves as valuable members of Kindred society. Certain ambitious younglings may achieve the rank prematurely. Ancillae often serve as aides and agents for elders or the court. Ancillae usually play their own power games as well, though these are of lesser consequence than the manipulations of the elders.
I’m still in the middle of the game and I don’t know how old the MC exactly is, but I’d say the character’s position pretty much fits this description.