"You will do great. I'll be there to cheer you up!
With that comment, his smile had gotten even wider and, without thinking, ended up putting his hand behind his head in the 'awkward self-laughter' way. During which he heard Shiro's own voice.
"Robert, hey! Did you see that, it was so cool! Shun was so great, wasn't she!"
Before he could reply, he seemed to shift focus to Sissy, who seemed to be returning the 'thanks' of the battle, while also point to some congrats to Shun aswell.
"Yeah, she did really good. But from what I've seen before, she's always been strong, in her way atleast. What I was actually suprised by, and truely impressed by, was you. You showed a lot of, how should I say, confidence during that battle. I hope Shun doesn't take this the wrong way, but I think what truely won you two the battle was BOTH of your determinations. Make sure to keep that in mind, and you'll just keep getting better."