He might not say thanks, but there’s a grateful look on Robbie’s face that clearly says he knows Drift is ignoring the chance to ask more about the dead Corps. He assumes the discretion will cover Drift's future interaction with Rich, too. It’s nice to see that tact and kindness are somewhat universal.

“Really? Huh. I guess languages only need so many words for a leader. Once you cover the basics, President and Emperor and all that, it’s pretty much time to start a new language and start translating them.”

Robbie laughs along with him. “I guess my usual plan of ramming someone with myself isn’t so subtle, and it only works because I’m not worried about dents.”

Staring at the discussed sword, Robbie clears his throat. Looks like they're both awkwardly talking about death. The implied fate of the friend is plain, and he’s at a loss. A response seems needed, but 'I'm sorry' is weird when he doesn’t know anything about it. “That’s a nice way to keep them with you.”