"Ah." That makes as much sense as anything else. Not even the weirdest thing that's happened to him. The idea of another Joker out there... and one that apparently made a choice he could not... is something he just has to accept.

He suddenly hates this 'Ren Amamiya' with an almost uncharacteristic passion. It boils, rancid, in his guts. His mouth is suddenly dry and he licks his lip to try and fight the feeling back. But it just sits there like a rock.

As for this Akechi not being the one he knows, unlike the man in front of him he only feels a guilty relief. While he would be happy to see Akechi back to himself, even if it would only be for moments before his rival killed him for his betrayal, it would be... worthwhile. But what if the happy, pleasant Akechi showed up? He's not sure he could bare it.

This way his secrets are safe in his chest.

"But you're still Goro Akechi, then?"