John is glancing at Konstantine warily, cause that 'understanding' sure doesn't seem to be in his eyes as he looks at the two of them. Hmph. 'Good friend'. Hmph. The urge to remind Arthur of the last time he thought someone understood their situation, what with him hearing voices too, is very high. How well did that work out, huh?

But he's going to stuff it down and... behave. It's surprising how expressive a face that looks like a flat mask can be. The transformation from wary to actively grumpy to skeptical to 'okay, fine, I'll try to be nice' is pretty obvious.

"I just got here," he finally says, voice deep and low and reverberating oddly. It's clearly not a human voice, but it's certainly not the voice of an evil nightmare demon sent to seduce the innocent. It's giving a lot more 'huffy teenager arguing they're only two minutes late on their curfew' than that. There's a quick glance at Arthur before he turns back again. One more time-

"Nice to meet you. Thank you... for, um, being a good friend to him... while I wasn't here."