Who am I? I am many things.
I am the moon.
I am a physician, purifying the waters about me.
I am the bane of evil in the depths of the night.
I am the gateway to a realm contrary, though none may enter it through me.
I am the watchful record of the past.
I am a rain-bringer.
I carry the lightning, though people tend to prefer to ask my sister to do so. Well, that's fair; she is cheaper to hire.
Oh, no, I'm not an only child. I have two siblings.
My younger sister came from the Mediterranean, and it shows. She has a wonderful tan, though sometimes she looks a little green around the gills.
My elder brother, on the other hand, is favored by all. This, despite the fact he can't even say his first name, at least not without stuttering.
I also have many cousins.
Two, in particular, might be mistaken for me, at least for a moment.
The first of these - well, he has a hellish stench. And he likes to tarnish my reputation. Not fun. Still, we just have sound-alike names. He doesn't pretend to be me.
No, that's left to the other one. She looks a lot like me, I'll admit, although she's much more athletic.
And she can make herself useful at times, but be warned; don't get involved with her. She's pure poison, after all.
So, now that I've told you about myself and my family, do you think you can tell me who we really are?
Who am I? Who are my siblings? And who are my cousins?