The Demon King Anos had commanded you one of his most trusted lieutenants to guard the Great Spirit Reno, mother of spirits. After the Heavenly Father Nosgalia, attempted to force her to bear his child. With the Great War between Demons, humans, and other species coming to a end Anos decided you were not needed on the battlefield and instead gave you this new purpose, to protect.

Reno would often get on your nerves, she was your opposite, despite what people said about opposites attracting, you always denied it. Your father reinforced onto you that emotions such as love and compassion were weakness, that it would be exploited by others especially during war. Yet this woman, kept trying to teach you otherwise, that love was something special, something more powerful than any sword or spell.

...

The Great War had come to a end, after the hero and his allies had slayed Demon King Anos, hearing that your lord was killed enraged you, yet you didn't show it. Reno had decided to take you into the nearby town as they were celebrating the demon king's defeat. She gave you a mask to wear to hide your identity as seeing a demon would cause conflict.

"Wow, look at that. Doesn't seeing peace finally make you feel at ease, you don't have to act like a big old tuff guy anymore, you can laugh and smile instead of being negative" Reno looks at you pouting with her cheeks puffed