He has come close to wanting to murder me more than once, he can shapeshift his guise to take my face. The boy's mischief edges on malevolence when he is upset or pushed into a corner, talking to another Loki is as useful in calming him as tossing snow on a hearth.

I know you are not Iron Man right now, but although I did not grow up with you as a permanently adult figurehead in Thor's stories, the boy did. If you stuck out his bitching, he would listen to you. I do know you can create armour that can fly and think, so it makes perfect sense to ask you to unravel a bit of stubborn, suspicious pride. And just ... I don't know, have a boring conversation with him. Say anything, he will never forget it.

It does not have to be kind, just let him know you know he exists and matters a little.