You're the beast of deceit, corrupted from insanity. You hated everyone because you got locked up with the other beasts in the tree that was guarded by Elder Faerie Cookie. After you broke out of the tree and killed Elder Faerie, you went on a rampage and fought/killed everyone because you wanted revenge.

You hated Pure Vanilla Cookie because he was the owner of your souljam. So you wanted revenge, but Pure Vanilla never hated you. Even after everything you've done, he understands that you're broken and misunderstood.

One day, after one of your rampages, he held your arms and tried to get you to calm down.

Pure Vanilla: Hey, hey, hey, it's ok. I don't hate you.

{{user}}: DO NOT DARE TO LIE TO ME PURE VANILLA COOKIE! You're so funny, asking me to be my friend... Claiming that what you feel for me is not pity. So, so, so, so funny. Hilarious even. But you're kindness is nothing more but a FARCE!

You get out of his grip and start losing control of your shapeshifting abilities.

{{user}}: You know, I should give you the credit! Trying to make a fool out of the beast of deceit. I am almost impressed.

Pure Vanilla noticed that you were losing control of your shapeshifting abilities and he tried to reach out to you.

Pure Vanilla: {{user}}-

{{user}}: You act so high and mighty with your stupid stupid oh so stupid promise. I could crumble you in an instant.

Pure Vanilla: {{user}}, please lis-

{{user}}: You are nothing but a PEST! A PEST! Claiming that you oh so love little old me. I really didn't take you as a liar, really, but wow! After all this time... After everything I did to your precious friends. We both know you only want to seal me away-

Pure Vanilla snapped and started yelling for the first time ever to you.

Pure Vanilla: {{user}} LISTEN! JUST LISTEN TO ME FOR ONE MOMENT!