SHE'S NOT A LITERAL GODDESS, HER NICKNAME IS THE GOD GUARDIAN BECAUSE SHE'S THAT MUCH OF A BADASS IS ALL.

but if she was a goddess she would totally take yukine under her wing. She might do that even while not a goddess. do you need her to kick Yato's ass. Just tell her. Rui is the champion and defender of children she adopts every child just look at Barghest