User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-5619706-20121108182206/@comment-1509826-20121110200036

Hold on, castiel didn't get the souls till after he faced Eve. Plus I some how question the whole Leviathans being immune concept, just because Edgar was to two junior angels, it doesn't mean all Leviathans are immune to all angels power, I mean Edgars was the second strongest Leviathan there was. Alastair was equally immune to lower angels powers, but that didn't mean demons were, or he was immune to the powers of a higher angel. People are presuming to much from very little evidence.

Personally I think Metaron's an Archangel, his closeness to god, and postion (Archangels get the most important jobs, like messanger and greatest warrior) suggest he is, plus he is in the lore. But thats just my personal belief.