About
The game's two protagonists portrayed as a couple.
Yggdra, who learns the "truth" of the world over the course of the story and grows through adversity, and Milanor, who watches over her as her first companion or otherwise tries to support her.
This isn't a canon pairing, but there is a character who canonically wonders if Milanor has feelings for Yggdra, and in a spinoff game('s audio drama), there's a character who tries to hook them up.
In addition, it's a fairly popular pairing, at least in the sense that hero/heroine couples are standard fare.