Spoiler Alert/ Plot Twist:

Evangeline doesn't end up with either Rahzun or Luca.

Luca gets killed in The Black Sacrament who gets murdered by Pirmon getting stabbed in the throat while he was defending Evangeline

Rahzun and Evan have a more of a sibling relationship at the end of the series

Sorry Medix if I crushed your dream  ^_^'