Thank you! I know a lot of people associate Remus with the moon because he's a werewolf, but in my mind Remus has always had golden-brown hair and light skin, so the sun made more sense. If anything, the moon fits Sirius more, since he has Black hair and light skin, but that's just my take on it.
I'm glad you liked the characters. Sirius' character came pretty naturally, but the others were more difficult.