Aina Winchester

A human mercenary with a demonic eye. In her youth, she lived in the UFS. At a young age, her parents were killed by demons in front of her. Aina, in turn, was tortured by the Demon Tribe and her eye was gouged out. However, she was saved by UFS soldiers and was given a demonic eye prosthetic. With no relatives, she became an orphan and was entrusted to an orphanage for the rest of her youth. Aina eventually became more and more driven by revenge and joined an UFS military academy. However, when graduating, she did not join the army. Instead, she became a lone hunter, chasing the monsters that killed her parents and making a living as a mercenary. The weapons she obtains can be boosted with her demonic eye. Using her academy-trained fighting skills to defeat numerous demons, she has earned quite a reputation in the UFS military. She is now loosely affiliated with them and uses her tools to accomplish missions for the UFS, at times she also confronts the Taimanin.