[XFire]

Originally Posted by ogon_bat

Section of questions without answers:

Does Maou gets to grow horns once she has had her first taste of Yuusha? (I remember a certain teenage succubus needs to taste some to become fully developed, even now she hasn't grown her wings).

No to the horns, her species of demon doesn't have them.

Originally Posted by ogon_bat

Does Maou has access to any high-level spells?

Not really sure, but she hasn't shown any.

Spoiler for spoiler about power level:

If you're wondering about combat level, she'd be on the low-end of the top-tier, about on par with Lone Winter King. The problem is that her lover (Hero) and her best friend (Female Knight) are flat-out abnormalities power-wise.

Originally Posted by ogon_bat

Will Maou come to share Yuusha with the priestess?

Eh. Yes and no.

Spoiler for for more detail:

Originally Posted by ogon_bat

Will there be any extras (as in Picture Drama) explaining many details from the novel the anime did not had any time to explain (like what were those ghost-like beings besides the head maid)?

Those were just ghosts. The only detail they could add is that Head Maid can use a bunch of different types. It's never really explored, just another of her many, many abilities.