Delta/Chronology

Early Childhood
Delta was once a girl named Sarah who was recognized to be the strongest daughter of the chieftain of her tribe. Because her father has about twenty concubines, she has over hundreds of half siblings. If she wasn't born as a girl, her father would have given her the position of the next chieftain. Upon learning that she has Demonic Possession, Delta's father attempted to kill her but Delta was successfully able to hide and escape before meeting with Cid.

When her body reached almost its limit of being powerless by the Demon Possession, Sara was found by Alpha and Shadow, she immediately proceeds to attack Alpha even in her weakened state without even hearing her, but when Sara looks at Shadow, she remains instinctively immobile when she realizes how powerful and dangerous he is. Shadow offers to heal her and give her a home to which Sara instantly accepts because of the "follow the strongest" rule, since then, Shadow names her Delta.

Assault on Viscount Olba
Delta and the Seven Shadows assaulted the hideout of Viscount Olba in order to rescue Claire Kagenou. After the Seven Shadows killed all the guards and Shadow eliminated Olba, they rescued Claire and return home. Delta would leave with the Seven Shadows to hunt down the Order of Diabolos.

Kidnapping of Princess Alexia
After Princess Alexia Midgard was kidnapped by the Order of Diabolos, Alpha orders Shadow Garden members stationed in the kingdom, including Delta to attack all known hideouts of their enemies. At one of these locations, Delta savagely slew all the cult members.

Holy Ground Infiltration
Delta was part of Alpha's group in infiltrating the Holy Ground. She then battle Nelson who uses his powers to send an army of clones of himself to finish off Shadow Garden but the Beastkin easily slaughter many of them. Delta later escapes with her team before Cid destroys the Holy Ground.

Mitsugoshi Co vs Great Commerce Alliance
Ordered by Shadow Garden, Delta had out to eliminate targets from the Great Commerce Alliance who had tried to sabotage Mitsugoshi Co. During one of these missions, Delta reunites with Cid and excitedly hugs him to his dismay. Cid, who is in undercover as John Smith, orders Delta to withheld information of this meeting which she complies. The two work together in eliminating assassins with one of them being her older brother, Ole.

In her second meeting with her master, Cid orders her to help eliminate Juggernaut of the Black Tower. She succeeds, presumably cutting off his head and returns to Shadow Garden who were ecstatic to see her, believing that she had been killed. After the Great Commerce Alliance fell and Mitsugoshi Co., Delta was last seen helping Cid dig through the snow. Delta discovers something but Cid left before she could tell him.