[ We're pretty sure Mipha's going to be the one doing the punching. ]

Please, if you are so intimately acquainted with my sister, call me Sidon.

[ Sidon beams warmly, having taken Mephisto's claims to heart. He'll corroborate them with Mipha once he's been reacquainted with his sister, of course, but there's no reason to doubt the stranger at present. ]

I do not know what this 'selfie' is. Please, enlighten me!