I bet the founder would be like "DAMN YOU INFERNAL LORD, i should have killed you when i had the chance" and **** fate for being such a wonderful loser to me. Hahaha
so imma guess he is one of the first people to enter the celestrial realn with the founder and discovered that the founder was disrupting fate and tried to stop him but was trapped instead.
I assume the clone looks like Noah and not Crixus so hopefully the Founder wasn't able to identify him - at best maybe identify him as the Infernal Lord...