Account... thing. Q.

...Being the ignorant chump I is... I didn't mix my Proph with my Facs. Now I have Proph+EotN and Facs+NF. Both with great characters.

...No way I can mix them huh?

More: My friend's... unused email's on the Proph account and mine's on the Facs acc.

No. You can try to start a support ticket and explain everything to them, but their solution is to delete one account and reissue new keys for you. That means losing everything you've done on the one account. But given how long you've played those separate accounts, I don't think support will be helping you.