664

664 is a member of the Shadow Garden, being one of the Numbers. She is the leader of a three-person squad consisting of herself, 665, and 666. After 666 becomes queen of the Oriana Kingdom, she becomes one of her maids.

Appearance
664 is a young female Elf with short blue hair, depicted as having a short stature and slim figure to contrast her from her partner, 665.

Personality
664 is a very diligent person who takes her role as platoon leader seriously. She expects her comrades to have the same dedication to Shadow Garden as her and often reminds them to keep their focus on their objective.

However, she is not as extreme as people like Victoria, knowing her limits and prioritizing the safety of her subordinates whilst taking full responsibly for their failures. Also, as per Shadow Garden's policy, she respects others' privacy and does not pry into their pasts. Overall, despite her tough exterior, 664 genuinely cares for her comrades, though she struggles to openly admit it.

Red Moon Incident
664 participated in the assault on the red tower in the Lawless City along with 665 and 666, who were led by Beta, to gather information and help their lord Shadow if necessary.

When the vampire queen Elizabeth was resurrected, they immediately attended to help their lord's sister, Claire Kagenou, who was seriously injured and drained of blood by Elizabeth. The members, 664, 665, 666 and Beta prepared to face the vampire queen. They faced the vampire queen, which protected Claire while buying time until her lord, Shadow to come to her aid. But then the girls cooperated with the 2 rulers of the other towers, Yukime and Tyrant, along with the guidance of Mary, the ancient vampire slayer, they all stand up to Elizabeth but in the end they are all seriously injured by her and then, Claire stands up but indifferently, and confronts Elizabeth holding her back, until Shadow appears and prepares to face the vampire queen. at the end Shadow attacks her with his opposite ultimate attack, "I am an atomic salvage", which heals everyone equally and destroys the red tower.

Great Trade Alliance Conflict
During the internal and secret dispute between the Mitsugoshi Company and the trade alliance, when it became known that there was another faction involved in the plot that was trying to cause the collapse of banknote credits. 664 along with 665 and 666 were sent by Alpha and Gamma to find out the places of distribution and transportation of gold by means of secret caravans, but when they were about to find out who they were, they were confronted by a man named John Smith, (without knowing that he was his lord, Shadow), immediately ordered 664 that they will attack but one by one they were defeated and immobilized by John Smith and his magical steel threads. They then withdraw due to John's warning, and then they informed Gamma and Alpha about their failure and provided information about what happened.

Oriana Kingdom Civil War
During the civil war of the kingdom of Oriana, 664 along with 665 and 666, were called by 559 to the kingdom of Oriana for an infiltration mission to see some ancient ruins that the Cult of Diablos was investigating. While they remained hidden, Rose's mother, the queen, was there to which 559 found irrelevant and prepared to strike down the queen and the Children of Diabolos, but 666 got in the way to avoid the death of her mother, resulting in 559 branding her as a traitor. Then 664 and 665 are forced to attend 559 resulting in the end in the death of all those present in the cult with she, 665, and 559 are seriously injured but then her lord, Shadow comes to their rescue.

Shortly after 664 tries to explain the innocence of 666 to his lord Shadow and the misunderstanding judged by 559, but when 665 informs about the arranged and compulsory wedding that Rosa is going to have, Shadow gets angry and says that he will not forgive Rosa Oriana (without her knowing that Shadow didn't know that 666 and Rosa are the same person).

When the "Black Rose" was activated and hundreds of demons appeared, 664 and 665 set out to help 666 in their battle against the invading demons, since despite everything, they wanted her not only as their partner but also as a friend.

Power & Abilities
664 after being saved from her demonic possession and being entered by the Shadow Garden, she has a skill and management of fencing that good that combined with her magic, she can face it and resist a fight against "first Sons" of the Cult of Diabolos.

She also has a very good intelligence to be able to analyze their opponents well, although not in time to be able to counteract them. During her fight with John Smith, she was able to analyze the magical steel threads that he handled with his hands but wondered how she could face it. It was not until later when she was immobilized that there were other types of threads made of mana but invisible to the eyes of living beings.

Rose Oriana
Rose was one of 664's squad-mates following her induction into Shadow Garden. 664 was annoyed how Rose doesn't followed protocol and acted on her own. However, 664 cared for Rose, even defending her when she abandoned Shadow Garden to protect her mother. When Shadow Garden chose to defend the Oriana Kingdom, 664 immediately came to Rose's aid.

665
She has a sympathy and trust with 665, although they have opposite behaviors, since more than once 664 scolds her for her sleepy and semi-distracted way of working, when they reported their failure in the mission to Alpha, 664 began to argue with 666 but there Alpha orders them to leave quietly, and then 665 takes them by force.

Shadow
She has a deep respect and loyalty to her lord Shadow, even when she defended the innocence of her partner 666, when Shadow would not forgive her, 664 accepts and respects her lord's will, even when it did not fit her.

Alpha
She has respect and loyalty to Alpha, since as the second in command of Shadow Garden, she wants to demonstrate her good results to her superiors and does not like things to get out of control, when she reported her failure in the mission to distribute money to Alpha and Gamma, 666 she wanted them to give her and her companions another chance, but 664 found it uncomfortable and they began to argue in front of their superiors without knowing that they were not complaining about nothing.

Beta
She has respect and loyalty to Beta like the other Seven Shadows of Shadow Garden, when Beta led the support of Cid's sister, 664 followed her orders to the letter.

559
He has respect for 559, even though she makes hasty and jumpy decisions at times, when 559 accused 666 of being a traitor in front of her lord, Shadow, 664 she did not agree with that statement she made and defended the innocence of her partner, 666.