To be perfectly honest with you, Sylas doesn't know Suzune too well. And, to be also perfectly honest with you,
He doesn't realise that what he's signing up for is a projection. He just saw a little group of people walking somewhere and figured it was nice to be part of something. He realises that he's made a mistake once they enter the courtroom and he sees the projection set-up, but by this point it's all a bit too late to back out, right? Especially not in the company of Akemi and Robert. If those two started judging him he'd implode on the spot like a poorly crafted souffle. (He pronounces that "sooful".)
But it is overwhelming, isn't it? Especially when they're all now outside and there are little sheepies instead of in the prison. Sylas' first response is joy, followed by realisation that they're not ACTUALLY in a nice little grazing pen, followed by… mild bewilderment at his new clothing. He's got the whole nine yards. He didn't even wear this many ruffles as a baby. Twenty-five years of subpar ruffle allowance being paid back in full.
"Oh! Well! Ain't I pretty now. Shucks, all these sheeps. Am I in New Zealand, or…"
No. You're not. He's going to go try and pat (and perhaps in the process examine) the sheep. Baa!