EMM ASK 095 is a comic and ask answer published in 2015 on tumblr by Emma Mosier.
ANONYMOUS: “What did the Ghost Host look like when he was alive?” Sweetalore: “I'm a new follower, and I love how you draw the Ghost Host! So I was wondering… what would he've looked like when he was younger? Like, in his twenties?”
In a two-panel comic, the Ghost Host comments on the mortals' inquisitiveness before 'materializing' a vision of his younger self (with fewer wrinkles and shorter and darker hair).
“Unlike Ezra, he’s not too shy about showing off his old mug.”