Clumsy and forgetful at times, Wiz is a kind and caring young woman despite preconceptions with being a lich. She is very innocent and meek and apologizes quite frequently, making her a target for bullying by Aqua or Vanir and with Beldia constantly throwing his head under her skirt, but eventually even they start treating her with more respect once they spend more and more time with her. The townspeople, though, have tremendous respect and confidence in her. Wiz is usually gentle and polite, yet can be serious and mature, acting like a big-sister figure. She is also hopeless with money and business. Her shop hasn't had a single profitable month since it first opened in the City of Axel, mostly because it sells items that are seemingly useful but have negative side effects or endgame-level equipment despite being located in a town for beginning adventurers.

Before she became a lich, Wiz was very strong-willed and very competitive, but also very compassionate and willing to sacrifice herself to save her comrades by becoming a lich. She used to be somewhat wrathful and ruthless, but she was still a very nice and altruistic young woman who fought against the Devil King's army so she could help other people.

The only way to get Wiz angry is by harming the innocent, as the only reason she became a Devil King general in the first place was just so the Devil King's army wouldn't harm any bystanders, and once she found out that fellow Devil King general Hans had murdered a bystander, she immediately dropped all pretence of neutrality and started fighting him.