Delta/Chronology

Unhappy Childhood
Delta was once a Beastkin Wolf girl named Sarah who was one of the chieftain's daughters in her tribe and she had over a hundred half siblings from her father with twenty of his concubines. However, Sarah did not expect much from her tribesmen because she was born to one of her lower-ranking concubines and was given meager portions of food which left her always emaciated and hungry, until her tribe finally stopped feeding her altogether when she turned three.

At that early age, Sarah intends to make her own hunt into the forest and manages to kill a wild boar twice her size by hitting its skull, then she drinks its blood and eats its organs greedily. It was at that moment that Sarah then realized that she could not only support herself with her two hands but did so effortlessly until Sarah learned the meaning of a beastkin's life if it hunted its own prey and that the prey was precious to those who devoured it.

When Sarah returned to her village drenched in the blood of her prey, all her tribesmen were shocked to witness her exploits that it was not normal for a three-year-old girl to kill a wild boar by herself, even among therianthropes so they started spreading the word. Since then, Sarah has been practicing continuously until her senses and physical strength have increased tremendously and she can even use magic even though she has never had formal training.

Later on when Sarah realizes that her physical body that was once malnourished which looks like nothing more than skin and bones has already grown so rapidly that even her siblings are afraid of her strength, if for example a child her age asks Sarah to fight, she will beat them in one punch and Sarah will go out to hunt for her own food whenever she feels hungry. Due to frequent grueling training and constantly eating from her own prey, Sarah's body quickly filled up and before long, she grew into a young girl with beautiful appearance and supple muscles.

By the time she turned twelve years old, Sarah is recognized to be the strongest daughter of the tribal chieftain in her tribe because no one in the tribe could match her and the only person in her clan who could beat Sarah was her father who was the chieftain. In fact, all members of her tribe made sure that Sarah would probably surpass the chieftain quickly, even her own father would have given her the position of the next chieftain if she wasn't born a girl.

However, Sarah has develop a symptom known as Demon Possession and due to the ironclad rule to all Beastkin that those who got "possession" had to be driven from their tribe without exception. After learning that Sarah has possessed symptom which was considered as filth for the beastkin, her father intended to expel Sarah from the tribe and attempted to hunt her down to death because of his duties as the chieftain. But, Sarah successfully hid and escape from her father's pursuit.

After fleeing from her tribe with her disease-ridden body, she began hunting throughout the forest and prowling aimlessly. Consequently, Sarah feels fine and less disturbed after she is kicked out of the tribe as long as she can continue living and hunting. However, the symptoms of the disease were eating away at her body and gradually she became so weak that it became impossible for her to hunt.

Even though her body was already reached at its limit due to feeling powerless by the Demon Possession, Sarah still continued to rise to be able to hunt thanks to her incredible willpower to be able to stay conscious in her current state. It was then that Sarah saw Alpha intending to help her and without hearing what she said, she immediately attacked Alpha even in her weakened state. Because Sarah was constantly attacking Alpha, she then asked for help from Shadow to take care of it.

Just as Sarah saw Shadow, she instinctively submitted when she realized how powerful and dangerous he was. Shadow offered to heal her and give her a home, to which Sara readily accepted seeing Shadow and Alpha as her new pack leaders, and Shadow named her Delta soon after.

First Assault on the Cult
Delta and the "Seven Shadows" assaulted the hideout of Viscount Grease in order to rescue Claire Kagenou, and Delta joined her sisters as they killed all the guards under the Viscount's command. After Shadow eliminated Grease, they rescued Claire and return home, but had her escape on her own to hide their involvement at the time. Delta would leave with the Seven Shadows to hunt down the Cult of Diablos, spending a couple of ensuing years building Shadow Garden's network.

Princess Alexia's Kidnapping
Hearing that Cid Kagenō has been accused of kidnapping the Second Princess Alexia Midgar, Delta rushes to the capital because she really misses meeting Cid. Learning that Princess Alexia was kidnapped by the Cult of Diablos, Delta takes part in a rescue mission as she leads the vanguard to ambush the Cult's secret facility bases from Fenrir's Sect Faction as the signal to start the entire operation.

After Alpha orders Shadow Garden members stationed in Midgar Kingdom including Delta to commence their raid, she strike on all known hideouts of their enemies in the capital. At one of these locations, Delta savagely slew all Cult members and split the building in two.

Sanctuary Infiltration
Delta is part of the investigative team that took part in the operation to infiltrate the Sanctuary at Lindwurm. Seeing that Cid Kagenō had won the duel on the "Goddess's Trial" after defeating the Witch of Calamity Aurora, Delta and the Shadow Garden members prepared to enter the Sanctuary after receiving a signal from Beta disguised as Natsume Kafka.

While inside, Delta saw the dark history of the past covered by the Cult of Diablos through Hero Olivier's memories along with the Shadow Garden team, as well as Princess Alexia Midgar and Rose Oriana who unexpectedly followed them, whilst she also detained Acting Archbishop Nelson and watched his behaviors. The moment when Nelson reveals his true identity, Delta attacks him suddenly. However, her attacks were ineffective to the point where she was brought by him into the Sanctuary defense system along with Alpha.

Later, Delta then battle Nelson who uses his powers to send an army of clones of himself to finish off Shadow Garden, but she easily slaughter many of them until the defense system breaks. At the time when Delta is still ready to fight after Nelson summoned Olivier, Alpha ordered her to withdraw once Epsilon with the investigation team she led already obtained all the necessary information then escapes from the Sanctuary.

In the anime, upon returning outside and witnessing Shadow's destructible power to annihilate the Sanctuary, Delta hasn't returned yet following the mission and Shadow Garden guess that Delta is still in the Sacred Land. But, they decide to leave Delta be as she will come back when it starts to get cold.

Great Trading Company Conflict
Ordered by Shadow Garden, Delta had out to eliminate targets from the Great Commerce Alliance who had tried to sabotage the supply chain of Mitsugoshi Co. carriage. 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, Leaf Four.

In her second meeting with her master, Cid orders her to help eliminate Juggernaut of the Black Tower at the Lawless City. 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. position become more powerful in the kingdom's capital, Delta was last seen helping Cid dig through the snow. Delta discovers something but Cid left before she could tell him.

The Academy Disappearances
TBA