Hello!

I hand you this Emissary (if you and Bucky would like him).

Elidibus has experience with losing one's memories and identity, so he will absolutely find kinship with Bucky. That the situations are entirely different doesn't matter. He's also had his own restored (which... that manner won't be available to Bucky, alas) but will present himself as one who has come through to the other side.

All of this to say: he would absolutely adopt that man.