Gods and experiments, they are broken into 'harmless' pieces and kept far from those who still fear their power - even separated as they are. From youngest to oldest: Sashi (great fan of all sorts of candy), Tenshi (gaming addict and angel), Triton (dancer), No Name (summoner of demons), Kokoro (the heart of a god), Seishin (the mind of a god), Nanashi (seductive thief), and Shimi (blood addict and fan of acidic things).
Each one considers the next as a brother and all of them are vampires. Some are more personable than others, so beware.
