I have Effie as +A ranked with Elise, so yeah, live and learn.
Trust me Watashiwa, I checked several times. I'm getting the feeling they missed checking on that friendship as the friendship seal clearly goes to Troubadour. If you want to check for yourself, then by all means, go and see that I'm not being crazy here.
And also I had learned today about the Unit Logbook when you're in the castle. With the logbook, you can learn the skills of those who are logged in there like those who visited you or, when you beat the game, the five selected units. Looking at the cost though, it's 'easier' to just seize/defeat another person's Castle for the discount...however, the five people the game asks you to select after beating the game? You can learn ALL their skills and not just the five shown. For example, with enough money, I can buy all 20 of the skills I learned from my previous avatar if I chose to do so...so uh, technically you didn't need me to get that skill anymore.
...and I just realized I saved over my Hoshiden save with my Nohr one...shit. Now I can't go back and get the kids shacked up with each other. Also I just realized that Niles is a dude that can S rank with a male Avatar. Huh.
Edit: Incoming Bond unit...and I didn't notice that you turned into a girl. Double huh.