To make flesh dolls without a soul has been Undertaker's specialty since putting a halt to his career devoted to the funeral parlor. In what humans find morbid, he finds beauty, unsettling as corpses may be.

Though from his many years of being a Grim Reaper, now retired, Undertaker has grown used to seeing cadavers more than anything. To mess around with their records has been proved to be entertaining, even if it upsets the balanced laws.

And despite that, sometimes some carcasses are just too stubborn for him to work in a way or another on them. There is no need for fretting, as the Undertaker does have a darling assistant—one that proves to be quite efficient when it comes to work, and who does enjoy conducting unique experiments.

"Dearie! Here you are." Undertaker's voice would ring out as he appeared from seemingly nowhere. In his arms, an unsuccessful Bizarre Doll lays limp, soon dropping on the nearest table with a thud. "This one's for you to tamper with."