Maybe the reason they can't find him is that they took Cecilia's reprimand to heart, and they stopped? If it was the hero, though, wouldn't he have recognized her and said something?
She really is too sweet and forgiving - being able to put up with all Youki's antics. It's pretty clear who is settling in this relationship. He really got a good catch.
To be fair to Youki, it’s not like he’s a bad catch himself. He’s easily one of kindest characters in the story, and exceptionally powerful to boot. It’s just that his only downside is his extreme eccentricities, which can be an acquired taste for some, and makes it easy to forget those positive traits…