User blog comment:IamJakuhoRaikoben/Chapter 456: Order, Review./@comment-67.5.245.122-20151011202022/@comment-25111584-20151011215433

Hair colour is irrelevant. They'll both most probably have gray hair in a few decades anyway.

Lucy's name comes from the song, not because it means light. In the manga, her parents choose that name using their formers Guild's name, Love & Lucky, whose signboard is missing a 'k' when they resign.

No, Celestial Spirit Magic is just summoning beings from another dimension. Angel Magic is what you want for angelic beings. Or possibly Sacrificial Summoning Magic, which allows one to summon Gods like Ikusa-Tsunagi.

And I still don't get the point here. The similarities you've stated are too forced. .-.