Number 2 (the sun, the moon, the stars) the Moon. Luminosity, reflection, the satellite that is your constant companion. Reversed it is darkness, absorption, solitude.
Eh, it's the moon. SF, sure, but there's also a moon in the traditional tarot, which I have made as well: XVIII: Moon [link]
though they have different approaches. You'll note that the traditional number for the moon is 18, but what are the first reaches of space we are able to observe and explore? The sun and moon, thus in a SF version, perhaps the sun is 1, the moon is 2, the stars are 3, and all others follow after.
I guess there is some anime influence here, what with the kimono or whatever, but whatever. She's not Sailor Moon, though, so it's all good.
Anyway, another submission for the Seventh Sanctum contest [link]