He watches her toy with her own charm, feeling similarly.

Had he needed to? No. He was probably justified in staying mad, for a few different reasons. But he couldn't do anything but be sympathetic, especially after she'd come to him and then chosen to heal his grandfather. She hadn't needed to do that, either.

"I understand what it's like." Not in specific. Palpatine wasn't his secret grandfather. But there had been a time when his own world was thrown into disarray by learning about the secrets his own family had kept, and then Palpatine had left him with more than a few questions of his own.