The pinky finger thread event in the suggestions page makes me wonder what'll happen to characters who don't have canon soul mates, though. None of mine have, for instance.
Umi would be connected to Fuu (and Hikaru, if she was around), and Hokuto to Subaru.
I REFUSE TO BELIEVE IT WOULD NOT WORK LIKE THAT.
And I'll make the Killer Dolls event :D I'm using that one for this year's Hallowe'en.