User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-66.185.206.31-20130919191326/@comment-9339850-20130919205040

Well in Vol 15, Life 1, part 4, there is this line

" Leviathan-sama also said this after seeing Mil-tan; Leviathan-sama also said this after seeing Mil-tan;

“That child had a pure and powerful eyes. Maybe that child was a magical girl that had an equal or greater Milky power than me. I still have spare evil-pieces, so I really want to scout that child into my group☆”

So theres always a chance i guess