I'd imagine you are." She replied with her own bit of dryness. If he had already met up with Sirius and Remus, and they were from different times, the fact that he was a ghost wouldnt be lost on Regulus. Being told you were dead was definitely a rude awakening in this situation.
"True. He hasn't a head for much beyond running head first into danger." Not that she didn't understand, all things considered. And there was a wrinkle of her nose at the full name. But Regulus wouldnt have known, and he was good enough to catch himself in that slur. "I just go by Tonks these days. Or Dora, if you must. And she's still livid that I dare exist." The last part was said rather cheerfully.
With that, she also put her wand away and glanced over with a smile. "It's nice to meet you, at any rate. Any blood relative that isn't actively trying to kill me is aces."
The fact that the other two she knew weren't the exact versions of the two she knew didn't escape her. But Tonks put that aside for the moment to contemplate the pattern. "I was in a battle against Death Eaters about...five of my minutes ago. You?"