Sol Invictus member, Tarquin Wroe, had a mortal fiancee.
Her name was Ophelia, the eldest daughter of House Moonwell. She was a well-respected artificer and a genius in the field of enchantment. She also happened to be Whitehearth's top expert on all technologies pertaining to Divine Armors and Armaments.
From what Tycondrius had gathered of his piecemeal memories, the only person in Ophelia's heart was her husband-to-be.
This remained true, even after Wroe had left the city... in what was essentially a promise to never return.
This did not sit well with Tycon, especially since he had found an ideal partner of his own.
He would not betray Elle's trust, such was the value he placed in their relationship.
Tycon believed his devotion to her led to self-introspection, tolerance, and a newfound level of patience.
Wroe's devotion... led him to one of the seven hells-- where Tycon discovered him by pure coincidence.