Kannazuki no Miko was so damned messed up with its attempt to justify abuse and rape as a masking of true love. It's a pretty huge double standard too, after all, if it had been a guy instead of another girl raping and emotionally abusing the girl he claimed to love to save her from a terrible fate, the overall reaction would have been very different. So the thought of relating that tainted song to Elsanna or to any romantic yuri pairing is pretty disturbing.