- Marie Mjolnir (マリー･ミョルニルMarī Myoruniru?)
- Voiced by: Chieko Honda (Japanese), Colleen Clinkenbeard (English)
- The Death Scythe in charge of Oceania. She is named after the mythological hammer Mjöllnir wielded by the Norse god Thor. Her most distinguishing feature is an eyepatch covering her left eye adorned with a lightning-bolt-shaped symbol. She is considerably carefree and absent-minded, and can easily get lost with her poor sense of direction, which is something of a running gag. She is also lovelorn, having gone through a string of failed relationships with people such as Franken Stein and Joe Buttataki, and desperately wishes to get married. She chose to oversee Oceania for the light workload provided with the job, believing it would allow her to focus on finding another boyfriend and settling down. Her soul wavelength has a soothing influence on those inflicted with madness. Her weapon form is that of a small black hammer that can transform into a tonfa, the length of which increases with her wielder's soul wavelength. In the anime, her weapon form is a large gray tonfa by default. In both cases, her weapon form shares the bolt-shaped symbol on her eye patch.
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