Oh! Uh-- Yes. [she gives a short nod] Sirens are humans born with innate special abilities each relating to something called 'Phase'. They are all born with their abilities, are always women, and there are only 6 in existence in the universe at any given time.

[There's a small pause] Oh and they all have a series of tattoo like markings across the left side of their bodies, each set is unique to the Siren who bears them.