Epsilon/Chronology

Background
Epsilon was the daughter of an elven noble family. She was praised by many for her beauty, intellect, and her martial arts skills. She was discovered to have Demon Possession one day and in response, her family and her friends disowned her as she was forced to run away from being hunted by the people she once trusted.

She crawled her way up a mountain trail while the disease started to take effect on her body until suddenly, she was rescued from death by Cid. Since then, she swore loyalty to him.

When she met the other members of Shadow Garden, Epsilon was dismayed at how lacking she was compared to her more skilled superiors such as Delta, Gamma, and Beta. Despite this, she moves forward out of love for her master and later decided to improve her appearance which would be appealing to him. During that time, she learned about the slime bodysuit and realized the potential that would allow her to reach her goal. By experimenting with it, she can significantly develop her magic skills, earning Alpha's praise. She is called the "Precision" for her magic control.

First Assault on the Cult
Epsilon along with the "Seven Shadows" assaulted the hidden secret base, where Claire Kagenou was being held captive. After they've dealt with the guards and Shadow defeating Viscount Grease, they rescued Claire and return home. Epsilon would leave Cid Kagenou along with the other members to hunt down the Cult of Diablos.

Rising Star of the Professional Pianist and Composer "Shiron" Debuts
After learning that all members of Seven Shadows had their respective roles, especially Beta had become a well-known writer, Epsilon decided to become a pianist in the Oriana Kingdom by presenting his debut plans to Alpha and Gamma for evaluation. With Lambda's honest opinion, Epsilon's plans were approved by Alpha and later Gamma would full-time investment in Epsilon in her debut along with publicizing Luna, Ltd.'s (former name of Mitsugoshi Company before changing the name) fashion business and promoting Alexandria tea to aristocrats at the garden party, which was hosted by the MNA branch of the Midgar Kingdom.

Before Epsilon made his debut as a pianist, he was trained by Lambda to be able to know the proper nobility etiquette so that later there would be no failures when performing. After the training was over, Gamma told Epsilon that Beta had arranged everything she needed during the event.

When the garden party started, Epsilon with the name "Shiron" as a wandering pianist made her debut by playing all the music that Shadow had taught her in front of the nobles, especially the Oriana Kingdom who wants her to become their patrons. After his debut, Shiron's name was known throughout the world as a professional pianist and composer and received many awards.

Princess Alexia's Kidnapping
At the time before Shadow Garden to start the mission two days after the release of her master Cid was indicted as the perpetrator of Princess Alexia Midgar's kidnapping, Epsilon would lead the support from behind in carrying out raid operations on the royal capital.

Sanctuary Infiltration
Epsilon under orders by Alpha investigated Lindwurm regarding rumors of Archbishop Drake's corruption and child abductions. However, she was too late as her target is already executed by the Cult to silence him and Epsilon is looking for their target's killer and manages to kill the executors men until she reunites with her lord Shadow after crossing paths with him. When Shadow wants to know the plan proceeding, Epsilon briefed him regarding their target has been slain by the Cult's executors who have eluded their pursuit even though they have eradicated his henchmen and that there will be a change in plans. Shadow informs her that he will be proceeding with his own plans. She then left to rejoin with Alpha to start their plan to infiltrate the Sanctuary.

When Beta signaled her and her team to come out of hiding after her lord win the duel against the Witch of Calamity Aurora, Epsilon with orders from Alpha apprehended the Acting Archbishop Nelson after defeated his guards and declaring he will join them inside the gate, even holding Beta who becomes "Natsume Kafka" hostage thanks to her subordinates Kai and Omega to keep Princess Alexia Midgar and Rose Oriana from doing anything. By the time Nelson refuses to come with him, Epsilon is then nearly ambushed by Executioner Venom after he calls out to kill her and she tries to dodge the slash, but the slash ends up cutting her fake slime breasts. Not wanting to be exposed as she recalled her life flash before her eyes, an enraged Epsilon managed to reattach them and quickly defeated Venom. Epsilon threateningly asked the witnesses if they had seen anything about her slime suit, but they said they had not. Epsilon then grabbed Nelson and jumped into the door, whereupon two of her subordinates join her after taking Beta to enter the door as well, not realizing that Alexia and Rose also intend to enter the Sanctuary.

After enter the Sanctuary, Epsilon saw the dark history of the past covered by the Cult of Diablos through Hero Olivier's memories about the truth behind the Three Heroes and Demon Possession along with the Shadow Garden team, as well as Princess Alexia Midgar and Rose Oriana. Epsilon also learn about the Cult's origins and true purpose was to create Tears of Diablos, as well as Nelson's connection with the Cult as the 11th Seat of the Knight of Rounds. When Nelson reveals his true nature, he begins to separated the group after Epsilon's team teleported outside defense system where Alpha and Delta are trying to engage Nelson.

During Epsilon is leading the investigative team around the Sanctuary interior, they encountered a sick person, but as it goes through Epsilon the person disappears. Epsilon then explains that it is akin to the "Goddess' Trial" possibly reacting to their memories and materializing into a possessed symptom like them. Then the investigation team find an archive with information about the possessed and realize that this could have happened to all members of Shadow Garden too if they didn't met Shadow. While investigating, the effects of the Sanctuary had inadvertently exposed her fake slime suit once more with her threatening her squad if they saw anything which they denied. On her investigation, Epsilon and her team learn that Diablos and Aurora are the same entity. Epsilon later reported to Alpha their findings during Delta's onslaught on Nelson after he called Olivier and left the Sanctuary after concluding their investigation was a success.

Upon returning outside and saw Shadow wipe out the Sanctuary from existence, Epsilon reports to Alpha that everything inside the Sanctuary has been obliterated and relayed that Beta has been working with Princess Alexia Midgar and Rose Oriana to learn more about the Cult of Diablos, using her "Natsume Kafka" identity to infiltrate their inner circle. Epsilon also summarized what she and her team had learned inside Sanctuary to confirm the theory that Aurora has another name, that she is the true identity of the Demon Diablos.

Bushin Festival Tournament
Epsilon met up with Cid when she was posing as Shiron. She informed him of Rose Oriana's whereabouts and later explained her mission to infiltrate the Oriana Kingdom to uncover both the Chancellor and the Cult of Diablos's involvement.

Red Moon Incident
Thanks to her lord Shadow's actions in stopping the Cult's attempts to spark a war between the 2 kingdoms by preventing the assassination of King Klaus Midgar by the time Epsilon traveled to the Oriana Kingdom, she easily managed to infiltrate the kingdom using her "Shiron" identity to get into their inner circle which made Epsilon's job much easier to carry out investigations on Perv Asshat's faction during their civil war against the Royalist faction for control of the country.

During her investigations in Oriana's capital, Epsilon researched the kingdom's history regarding the origins of Black Rose that once nearly destroying the Oriana Kingdom in an instant and the Cult of Diablos's connection to the Kingdom towards Black Rose. Epsilon also knows about Queen Reina Oriana's involvement with Royal Chancellor, Duke Doem Ketsuhat and it is confirmed that both of them have been conspiring to seize Oriana ever since the King Raphael Oriana sent Princess Rose Oriana to Midgar Kingdom.

Oriana's "Black Rose" Civil War Wedding
When Cid traveled to Oriana castle upon learning that Rose was being held prisoner there, Epsilon saved him from detainment after he was caught loitering around by claiming he was her apprentice. She excitedly applauded Cid's performance to prove his innocence to Doem Ketsuhat and the nobles all the while he pocketed the Chancellor's engagement ring on his way out. She would then form a rivalry with one of the kingdom's maids who attempted to poach her master into working for her family.

After reprimanding her protégé and subordinate Victoria for failing her mission the first time, Epsilon says she also feels guilty regarding Rose Oriana's supposed betrayal for not telling Rose the truth about her mother and justifies Victoria's decision to retrieve the ring which maybe a key that connected to Black Rose. Due to the situation, Epsilon had already sending a message to Alpha for send additional personnel before Cid interrupted their conversation as he entered the room and both of them are affectionately welcome him offered him a body massage. Cid tells them that during his infiltration, the investigation that he conduct had already went well and the only thing left to do is nip the problem at its source and his mission will be complete.

The following day had a predatory Margaret attempt to poach Cid for the last with Epsilon being forced to intervene and help her master in showing the way to the queen's room, Cid revealed to the elf that he has figured out what to do and was curious to see the Black Rose shocking her after telling them what has happen to the kingdom. Later when Epsilon is bath together with her lord, Cid tell her that everything is at its place and the showdown will be taking place on the day of the wedding ceremony by the time Rose make an signal, which make Epsilon decide to make the necessary preparations. In the manga, she like Alexia was fixated on his "Excalibur" during his report and briefing at the hot springs.

When the battle for the Oriana Kingdom commenced, Epsilon joined with Beta in defeating Mordred. The Round Knight nearly beheaded Epsilon when she narrowly dodged him. Being scarred on her cheek enraged the elf with the former princess joining and the two sides fought to a standstill until Shadow defeated Ragnarok. Left with no option, Mordred mutated himself by consuming a piece of the beast's flesh and fought Shadow, resulting in his defeat and severed head activating the Black Rose.

Return to Earth
When Epsilon was in a meeting in the director's office at the Mitsugoshi hotel to hold a meeting to discuss about Rose Oriana's situation for the Oriana Kingdom which was currently still under repair after the damage caused by Magical Beasts, she was ecstatic to hear the report from Victoria that both her master and Beta are return from another world after entering the Black Rose.

In Victoria's report, she stated Shadow is heading for Midgar Kingdom in quite in a hurry due to the Academy winter vacation are almost over and telling that Beta has brought a few interesting things back with her during her time in the realms.

As such, Beta arrive during the meeting with Epsilon alongside Alpha discovering what her rival came back with. After Alpha reprimanded Beta, they and other Shadow Garden members resumed their meeting.

The Academy Disappearances
Epsilon was briefly mentioned when Alpha was discussing on who to send to the Academy to infiltrate. Eta interrupted that Zeta has already infiltrated the Academy after she was dragged and woken up by Gamma.