It's not the first time he's thought it, or been terribly upset about it, but as her hand comes to rest atop his, the Doctor's hearts ache with the knowledge that such a young girl has been thrown into such a terrible situation. He's seen it more often than he would like, the suffering of innocents, but Kamala is the one in front of him now and he'll do anything he can to keep her safe.

Once her hand is in his, he covers it with his other hand and smiles gently.

"When I'm afraid and I'm trying to gather my thoughts, something that helps is holding on to something—someone—and counting my breaths."

Though that's a gentle lie meant to comfort, he'll hold on as long as she seems to need, at least until she looks a bit steadier. Gently, then, "Tell me about what I saw just now, that purple light."