Jack

Jack is a pumpkin doll and Matilda Matisse's spirit ally.

About
Jack is actually the spirit of the legendary serial killer Jack the Ripper.

Appearances
Jack has made short appearances like Chuck and Ashcroft. He made an appearance in reincarnation 1's title page. Then he was on Matilda's back when her, Kanna, and Marion are arguing. He is also entertaining Matilda on the plane to America. He was with Matilda when they are enter the Patch Village. He fought T-production in "Hana-Gumi". He also fights Tamao Tamamura and Tao Jun.

Oversouls and Attacks
Matilda's over soul is Jack the Ripper Trick or Treat.