Aubrey is a demon of Hell. She can be summoned by performing the ritual in the Kitchen Basement if Erik has the Lighter and Torn Page.
Backstory
Aubrey is a Lilim; one of the first 100 daughters of Lilith, although she has forgotten which number she is (not that she cares). Born thousands of years ago, she has over time carved out her own little realm in the bowels of Hell, where she lives in a huge tower and reigns with terror over her subjects so they won't even think of rebellion. Literally; she made obedience collars that shock people for such thoughts mandatory among her lower-class servants.
Personality
While outwardly downright adorable and bubbly, Aubrey is only affable and "friendly" to those who don't offend her, which is unfortunately a rather easy thing to do. If offended, she reacts with wanton violence and cruelty until the problem goes away. Those she likes, she generally doesn't hurt much, but genuine love is a foreign concept to her. Charming her is just as easy as offending her though, as she is quite vain and prideful, and likes alliterative titles the most. Of course, this can also heavily backfire on the charmer, so caution is advised when trying to compliment her in any case.
One peculiarity with Aubrey is that, unlike most if not all other Lilim, she is a full-time futanari by choice rather than occasional convenience, and enjoys it a lot when she can violently peg cute traps. To this end, she has a huge harem of mind-broken and willing sex slaves to do with as she pleases.