Time, age, and positive relationships have softened Damian. But he's never not going to be DAMIAN. Abrasive, arrogant, and dismissive is part of the package.

He understands the general gist of what Dominant and Submissive means here. But it doesn't occur to him to use it in any way with Tim. They might clash (frequently), but Tim is family to him now.

He wonders why Tim HAD a picture of him on his arrival, but doesn't bother to ask. He's still frowning unhappily, but he adds stiffly. "Thank you for saving me the trouble of informing him again."