Here's all of the character endings from Soul Calibur 2 HD Online and I've also decided to add Link into this since he doesn't appear in Soul Calibur 2 HD Online.
Mitsurugi be like > searches for the unbreakable sword with eldritch horror that posesses people within it > finds sword > banishes eldritch horror > doesn't even notice it's influence > "nah, looks stupid" > breaks unbreakable sword > continues on with his search
I could have sworn that there was an ending where the winner breaks Soul Edge and frees Siegfried, and helps carry him out instead. I'm very likely misremembering this.