I keep a track of how many battles I've had (roughly) and when I met Miser with Yoshimitsu I did not manage to beat her (but it was a close fight, she had 25% or less life remaining). However when I completed his Tales of Souls route I got the message that she has been unlocked even though all characters must be either beaten or you have to reach a certain number of all battles fought in order to unlock them. But I've got about 450 fought battles (it's a sure thing, I know it thanks to some other items that got unlocked because of the battle req.) and Miser needs 750, so it doesn't make sense why did she get unlocked. Is it possible that nobody else has managed to do this or at least hasn't posted another way of unlocking her online? Similarly I had reached the Labyrinth with Knightmare even though I had some losses previously with him but I didn't meet Olcadan inside, I fought with somebody else, I think it said it was an unknown soul and I couldn't see who it was. And when I lost I could fight him again.