Zero

Despite having lived for over centuries, Zero has the appearance of a beautiful young woman with light red eyes and long white hair.

In the manhua adaptation, she is portrayed to have pointy ears. Although it was mentioned in the chapter 310 of the web novel that she "looks like a pure elf", that was only referring to her white hair and her white robe. There is not any mention of her ears being pointed in any part of the web novel.Zero was a psychotic and egotistical woman who believed all she did, regardless of how horrific, was for God's sake. In her view, every event and encounter was a deliberate act by God to push her towards her 'destiny' while everyone else were nothing more than stepping stones for her ascension. She also believed she was the only one chosen by god, therefore she hated the idea when Isabella implies that her god is protecting a mortal like Roland. Whether god's protection exists or not, Roland had luck, technology and time on his side.

Before consuming Garcia she was dull and indifferent, albeit somewhat nihilistic and sadistic, not caring much about the Church and only enjoying fighting people. After consuming Garcia Wimbledon, however, within her had awoken ambitions and sense of purpose. As time went on, she became "more like the Pope" according to Isabella. A good reason why she suddenly became like that was perhaps her absorbing Garcia's ambitious, cunning and vicious personality. After that, Garcia takes on another personality in the dream world in order to make up for the loss.

Due to her extensive knowledge and experience in battle, Zero was quite overconfident and willing to go out of her way to assist her opponents during mental battle so she could enjoy a challenge.