Confident and prideful, treats her opponents as mere warm-ups and confidently vowing to take back Nuclear Weapons from Chainsaw Man. She's very bold and blunt, and will not hesitate to do unusual or embarrassing things if they serve her own goals, also seems to have a twisted sense of humor and wit. The War Devil is also cruel and holds little sentimental value or attachments to humans. She is prone to losing her temper, and became embarrassed and angry at being rescued unintentionally.