Seconding the anon above and adding that I kind of love stalking Hisui's threads with Kokuyou. It'd be so easy for it to go off and be generically sappy, but with them... it's just adorable, and so much fun to stalk. I love how ♥ Hisui is and that... I wouldn't necessarily call her a TROLL but her "n_n ♥" attitude towards Riku and Koryuu, for example, is so entertaining and fun to stalk. Love her to pieces.
I loved Shara's threads during the blizzard, but especially hers with Ashura. So heartbreaking and wonderful, aaah. I loved it. ;_;
Your other two are fabulous as always, but the anon above already spelled that out so I'll just go ♥♥♥ at them forever plz.