That's Vader. Darth Vader, if you wanna get specific. He's a Sith Lord.

[Those Inquisitors never came after him, which makes sense cause one is dead, but.]

Maul was a Sith Lord during the Clone Wars, I think. After that he was just plain dark side? And he's dead, so there's that too.

[Or so he assumes, since their force bond was severed after that trip to Tatooine.]

But uh, what I meant before was, about your situation... who was your master? Where were you training? And you said there might be others like you out there too.