I couldn't help but notice that, upon two characters achieving their A/A+ rank, they would then eternally keep getting "hearts" in battle just like they would when building towards a support rank. Now, when building supports and two characters are ready for a convo, the hearts stop to alert you those two are convo ready. Then the hearts resume for the next level. So, if they had that in place, why turn it back on once they're at max support? I also noticed the endless hearts don't happen for units who only get a maximum of B rank. So, adding all this up, maybe that's a tool to help you guide the epilogues as you wish: keep making those two gain support after their last convo. The "closest friends" thing could just maybe mean the character in question gets MORE support points from that character than the others, and that's what's throwing some suggestions off? I'm prolly way off on all this but might be worth testing. I just finished my first BE run, maybe I'll get a notebook and intentionally try to get two or three pairings. One group alone just to see if maybe the "closest friends" giving more support theory holds water.
