Im happy that Brad had Girlfriend and not all girls focus on Ryen only, I hope trey will have a girlfriend too in future updates.
Brad's character arc feels complete, escaped as a slave/refugee, return as a martial artist(master?). Even got himself a girlfriend at the end.
Trey's character doesn't feel like fully developed yet, not much backstory, mostly feels like a typical loyal knight. I would love to see him getting more story. If he did get a girlfriend, I'd imagine her being his subordinate, maybe a female knight or a spy like Kurohime.