...Brando doesn't look away from the vampire during the discussion. But Amber was almost obviously losing.
Also, he didn't plan on leaving the vampire or the other thing in any capability of speaking in the end either way so, why bother?
Now, without surprise, it'd be a bit more difficult but, he simply out of nowhere starts running towards the vampire and trying to think of something. White Court Vampires could match him in strength, were faster and could heal. He could take more hits than them though. But he had very deadly claws and fangs and a longer reach
As long as the thing didn't get a lot of help from the other monster they were either evenly matched or he had the upper hand
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Alertness 3 for Initiative, though I'm probably losing it