Despite the similarity of their names (entirely coincidental),
Claude LaCroix and
St. Croix are in no way related. The common factors between the two are their place of origin -
Crüxworld - and the French part of their cultural heritage.
St. Croix, you see, is an angel. Claude, on the other hand, is an eternal. Quite a charming one, too. He will be introduced in the second chapter of Eternity - still only 50% done.