Sin

Personality
He feels uncomfortable in orderly situations and is not too good at social dispositions. On the contrary, his personality that doesn't look back on what's done may seem insensitive, but his simple and innocent personality can be refreshing. He also has an optimistic and cocky side to him. He also considers his appetite as something important to him.

History
Tetsuya Issa was born in the year X541 exactly 250 years before the current timeline of X791. He was born in the capital city of the Empire Of Ybililia. He was born during a time of civil war, as such Tetsuya did not have the luxury of a normal childhood. Both his father and mother were both high Unit Captain of the 2nd and 5th Divisions in the Ybililia Army. For those reasons and because it was a time a war Tetsuya spent little to no time with his parents as a child. Because of there high status in the Army Tetsuya was raised under the tutelage of skilled and wise army figures. The hope was that by taking training child of two legendary Captains at a young age that they would be shaping the next generation of their army.

After training for 18 years of a strict, harsh, and tiring military  training Tetsuya was assigned the position of Captain of  Unit 7 and for good reason though he was young he was skillful beyond his years. He participated in many key battles that earned him the recognition of many of his comrades. After fighting in over 45 battles for his kingdom it looked as though the war was all but won. All that was left was to retrieve two very powerful magical items the Zaiakukan Eye & the Chaos Shard. After pinpointing the locations of both Tetsuya was tasked with retrieving the Zaiakukan Eye. Determined to end the war Tetsuya set out with haste.

After arriving at the ruins the Eye was said to reside Tetsuya quickly began his search for it. Upon reaching a giant room Tetsuya was met by what appeared to be a Demon. Tetsuya believed this to be a form a guardian or protector of the Eye and engaged the demon in battle. In a battle that seemed to last a lifetime Tetsuya emerged victorious but greatly injured. He stood of the the demon and in his pride and glory demanded the demon offer up the Eye to him. In an unexpected turn of events the demon raised it's arm trusting forward piercing Tetsuya's forehead. He screamed in pain falling to his knees, as he lost consciousnesses he heard a unfamiliar voice. "Foolish mortal from this day forward you shall live your life as the keeper of Zaiakukan Eye. You shall carry the sins of all who came before you."