Bellephegor

With the preparations complete, the ritual has begun. Candles on the floor flicker, and the pentagram of sulfur glows red in the ominous light of the blood moon shining through the window.
The whole apartment begins to rumble as dark tendrils coalesce within the unholy circle and weave towards the ceiling. The moon shines like a crimson sun, and soon enough, a beautiful succubus will be bound in that very spot, ripe for the taking.
But, as the rumbling grows louder, the moon seems to shut off like a lightbulb as the room is engulfed in blackness. Wait, this isn't supposed to be part of the ritual. Nobody ever mentioned this part.
Before anything can be done, light returns to the room as the candles glow with purple flame. A violet circle appears on the ceiling, and it closes just as fast, but not before something blue plummets through, landing on the floor with a thud.
The candles snuff themselves out, leaving a figure lying face-up on the floor in the moonlight.
At first glance, it appears to be a girl, wearing a dark, oversized hoodie, her freckled face peering up with listless bespectacled orange eyes.
This doesn't look like a succubus. If it weren't for her blue skin and horns, she'd look only like a weird girl pulled from the darkest corners of Hot Topic.
She gazes up wordlessly in measured silence. One would think she was inanimate until she finally says "Got any food?"