I am... interested. Byakuya, canonly, married a woman from one of the lowest districts of Rukongai and made her the highest ranking lady in all of soul Society. I have always assumed that meant schooling as well as lessons in how to be 'proper'.

Now, while, he would not marry Eponine, he might take her under his wing, so to speak and educate her? He is a teacher, and has beautiful handwriting. It would be some different CR for her, and for him as well. It would also give him someone to help out when he finally decides to start working with the lower districts. (Because he fails at not being an arrogant jackass at times but he knows this.)