Xenovia Quarta

Xenovia is a beautiful young woman with chin-length, blue hair with a dyed green fringe on the right side and brown eyes.

When Xenovia was first introduced, she was shown to have a calm, quiet, and serious demeanor, putting her mission first and only speaking when necessary. She was also very cold, bordering on heartless, as she called Asia a witch for becoming a Devil (even though she became one unwillingly so she could be with Issei) and even went so far as to try and kill her. She later threatened to do the same to Kiba when he was technically a Stray. After being reborn as a Devil, however, she gains a very close relationship with Asia, being touched by her kindness and apologizes for calling her a witch when they first met.

In battle, Xenovia appears to be a bit arrogant, stubborn, and rarely uses her head in attempting to overwhelm her opponents with pure power and strength instead of being subtle or using skills. According to Issei, her fighting style is comparable to that of a Rook despite being a Knight, referring to her as a "Power idiot". As Xenovia was raised in the Church, she lacks common knowledge on the life of a normal person, evident when she brought a box of condoms to school as well as wanting to give birth to strong children, and has chosen Issei as her mate.

As the series progresses, it is shown that Xenovia has developed genuine romantic feelings towards Issei due to him protecting his comrades, even if he gets injured by doing so. As a result, she becomes more aggressive in seducing him, which proves that Xenovia is quite perverted as well, a fact that she is "cool" with.

While a faithful member of the Church, her beliefs are flexible enough to accept help from a Dragon, such as receiving a free lunch (after Irina spent all their money on a fake painting of a Saint) and wanting to not only accomplish their mission but survive afterward as well. Although Xenovia started off harsh when concerning issues such as Asia who was a former Nun dubbed a Witch for healing a devil, she has since become more open-minded about with her beliefs as she deeply sympathized with Masaomi for being unable to be with Cleria and even shed tears for him even in battle conflicting her serious nature in combat and even held onto him after Rizevim killed him.