Dianna

Daughter of a humble Apparel Craftsman, Dianna grew up average as could be. Her and Tony's families were close so it was no surprise they had grown up together. It was only when both their mothers had died due to a horrible fire when they would be separated, Tony left with no other choice then to go along wherever his father did.
The female would miss him. While others would come along, none would affect her or have the same bond like she did with Tony, so rather than moving on and finding something better to do, she would wait for his short return in town every once a year, and in the times they could not be together, they would write any time they could.
Dianna couldn't help stay with her spiky friend. Having grown up together for years before he was dragged away she felt a certain obligation to remain loyal to him, while more supressed feelings would nag at her heart as well.
When his official return to their town was confirmed she couldn't help but be overjoyed. Staying in the same lair, the two would mostly spend their time explaining what they had done in the years they were separated, usually ending with Tony talking Dianna to sleep while telling of the adventures he'd had with his father.
While to them it seemed out of the question, many could see the love blooming between the two.
---
Having met Persephone and Kyle on not one but multiple occasions while with his father, Tony would become close friends with them, and later on introduce them to Dianna.
While he and Dianna choose to not always travel in the group, it isn't unusual for all four to be seen walking through town together or for the pair to disappear for a week, presumably with Persephone and Kyle.