[PF/3.X] Demon-Devil hybrids

[The Insanity]

Are there any official or 3rd party Demon-Devil hybrids? And I don't mean a Demon/Devil with a template, but a whole new monster, similar to the celestial-fiend hybrid, the Concordant Killer.
If there aren't any, what do you think would they be like? More powerful than either of their parents? Weaker? Something completely unique, or maybe a mockery?

[Silva Stormrage]

I don't think that concept exists. I haven't heard of anything close to it.

[Fortinbro]

Lilins in Tome of Horrors are flavored to be the child of a devil and a demon but they are just considered devils. It's a shame really.

[JHShadon]

I don't know of any but Pathfinder has the Amalgam Creature temlplate (http://www.d20pfsrd.com/bestiary/monster-listings/templates/amalgam-creature-cr-special) that basically combines two creatures into one, so it might be something you can use or it might be useless for this topic.

[the_david]

There's one in Bastion of Broken Souls. It's called the Cathezar and it's a mix of a Kyton and a Marilith.