Ingrid and Ashe - I was charmed by the quote-off in their C support, appreciated the seriousness of the B, and heartened by the A support.
Edelgard and Lysithea - they have things in common, and you see the relaxed side of Edelgard, Lysithea's story, and it made me really bummed that
Bernadetta and Dorothea - mostly the B support, where Bernadetta reveals why she runs away from human contact. In fact most of Dorothea's supports are my favorite, like hers with Ferdinand and Linhardt.
Sylvain and Mercedes - Mercedes reveals her backstory, and Sylvain is serious and not a flirt for once.
Hubert and Petra - Petra wants to prove that Brigid can be an equal to the Empire and Hubert doesn't act like a jerk for once and, in their A support, begins to take her words into account.