Envy will absolutely take the slow, groggy wakeup over a confused panic-scramble! He's been sleeping in the same bed as a Silent Hill protagonist for long enough to be careful about waking up anyone who's Been Through It (tm). Especially when he really has no idea what's 'normal' for Wrath at this point.

He'll give him a few extra seconds to be woken up enough for things like: understanding language.

"You were really out, huh? Ah, Scar's here too, if that's fine."

Since there wasn't a wakeup panic, Envy does let his voice start sliding out of 'hey lost kid I'm so very trustworthy and I've got some rocks to sell you' and into a little more natural for here friendly tone. He glances over his shoulder to check where the other man is. He'd noticed the careful distance on the way up.