In response to the question, Adia and Caspar just sort of look at one another. "I don't know," she replies. "I know that it's been done that way for a long time... I guess it's like when you pledge an oath, you get on one knee sometimes. Maybe it's because of that? How do people propose where you're from, Amelia?"

Caspar stays silent on the matter. He has his own reasons for getting on one knee, all of them deeply personal: A promise, a posture of vulnerability, a way to look up to Adia literally. It's why he was so comfortable with such a human tradition.

Anyway, the ring. Another tradition he was excited about, because he was able to give Adia an expensive gift and now everybody knows she's engaged. "Hunter made it," he explains. "A friend of ours in the Nexus. There's tulip pulp mixed into the band."

"The orange sapphires are for orange tulips," Adia adds, not putting her hand back down just yet. She's admiring how it sparkles in the light. "And the band is the same sheen as the alloy that makes Centurions." She wiggles her fingers and grins. "The diamonds are there to be fancy. Just like Caspar."

"Hey." The Cylon blushes and tugs at his tie. "Diamonds are a classic. Don't knock a classic."

"Of course not." She leans in and kisses him cheek, then smiles at Amelia hopefully. "Can we order now? I've really missed a good slice of pizza."