Bastien hadn't been expecting the quick movement, the close way that Regulus stood to him when he spoke, and he found himself trapped between the door held closed and Regulus' rather sturdy body, and had no real option but to tense for whatever was coming. To his credit, he didn't flatten himself against the door to put distance between the two of them - no matter how much he might have felt he should. Instead he stood his ground, chin jutting a bit in a quiet challenge. A sign that perhaps he wouldn't be entirely simple to kill, if that was where this was going.
Black. He knew the name, of course, the way every Pureblood family knew some of the names of those considered near royalty in their society. But the Black line was lost in men, he was sure. Still, that look in the man's eyes, and he didn't doubt Ursine's at his word.
He swallowed once, not sure how he should answer that, and opting instead for simply nodding once to show he'd understood. He'd expected trouble to come for the last two years, after all.