A doppelgänger is someone who looks like you but isn’t. In an alternate universe it would still be Eno – possibly one who not only leave the faucet running but doesn’t like beer too.
Opossums and possums are different animals. Opossums live in North America, while possums live in Australia and other countries. Both animals are marsupials, but possums are more closely related to kangaroos.
I think Mrs Santa would accept having Louie in his lap as the best reason for not getting up.