We really don't even know if this was Adam to begin with. This was during the time when Viv said the only Biblical characters she would be using in her show was Lucifer and Liltih (though she's from Jewish mythology but I digress).
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We just know he was the General of Heaven's army (which if we were going by Biblical lore, would be Michael; but there is no confirmation of this being the case for this character either). It's hard to know what his personality would be like, but I figured it would have been something like we got with Sera.