As someone who's rooting for Sauro&Arsenio and has 'read' up to chapter 77, I'm actually more confident that if Arsenio does end up with someone (again it could totally ends with them just all friends) there is a high chance it'll be Sauro imho.
Sauro as a character is really making everything move on, the plot, the relationships (romantic and others), even personal issues that some of the characters are having (giving more confidence to Rei in many ways, Arsenio's reignited dream to be an armsmith, and... someone else, you guys just wait for that ch77), and I freaking love it.
Anyway good chapter T_T once again had me tearing up.
Thank you!