Anya

The Deuteragonist of The Last One.

A shy and timid girl who always kept to herself. She was unable to make any friends except for Shiro, who she thought of as a big brother. She was happy to meet Vergil, Raven and the rest of the group. She had grown fearful of Amanda due to the fear and pain she caused her.

Back ground: 

The last guardian angel of earth, who fell from Heaven during the War between Lucifer and the Goddess. She and her mother took shelter in an abandoned home in the middle of nowhere. Shiro finds both of them, and helps him out until Amanda finds them and kills her mother. Shiro, having no other choice,takes her to Amanda, who puts Anya through clinical trials: such as putting her in near death experiences, extracting blood, attempting to interbreed, even testing her fighting and healing abilities. She attempts to escape but is harshly punished for it each time until Amanda puts her through a near death experiment. Because of this she became timid and fearful of her. Despite her objections to the trials, she endured them for years, hoping someone would save her. She only liked Shiro who would comfort her after the trials. Just when she had given up hope,  Vergil rescues her and takes care of her.

After Vergil takes her in, he trains her to use her magic skills. At first she is distant with Raven Hal and Vergil. Quite shy and keeps to herself, she opens up after they save her from demons.