/tries to be good about not spamming :|
So here is Haneul (whose name I am not 100% sold on even though it fits a little too perfectly, as it mean 'Heaven' or 'sky'). He would like a twin sister for over at yegods! PB for her is open, but I have some suggestions if you need them (his PB is DubuOnew in case you couldn't tell whose adorable face was staring at you).
Together, they would be the son and daughter of Susano-o (of the Shinto pantheon) and the idea would be to sort of play on their relationship in a way that parallel's Susano-o's relationship with his older sister, Amaterasu. (Noteworthy that there exists already at yegods a son of Amaterasu, but he packs a lot of heat [lol because she is the sun goddess] and Haneul is a wimp).
There would be lots of teasing, hair-pulling, and throwing stuff (maybe we'll stick to My Little Ponies, instead of taking that particular page from the Kojiki because I am pretty sure Onew would faint if he had to so much as look at a flayed horse).
I have about 90% of the details worked out (because I am sadly not banking on a bite for a sister ;;), but they are easily adjusted to suit your desires!