Name: Taro Moroboshi 

Age: 1,500 years old 

Species: Doll

Sin ( if applicable): N/A 

Sin Mark (if applicable): N/A  

Backstory: After Merlin had been rescued by Meliodas, and had fallen in love with him, she had come to realize that her feelings would never be returned due to the presence of Elizabeth. One day, as Merlin was consuming knowledge and learning to try and fill the void, she came across an old child's fairy tale, about a doll named Taro who came to life to protect the little girl who owned it, which gave her an idea which was two-fold, to create a living doll of her own. This would be both for her to test her knowledge if she could create a life, and also to see if she could create someone who would fall in love with her. 

It took her a few centuries, but soon she had created her living doll. She named him Taro after the fairy tale, and the doll had been perfectly done. It was strong and could fight, and had a singular desire to love and to protect her. Despite this, Merlin wasn't entirely satisfied with Taro, and so while she never destroyed him or took his sentience, she would send him away for long periods of time, to acquire things for Merlin, or on missions. It was Taro who had given her knowledge about the being known as Chaos, and so began her goal of reviving Chaos to see if Chaos could heal her heart. 

During this time, Taro began to develop emotions and feelings have been around humans on the quests Merlin had sent him away on. While at first he had been away on quests for so long because he didn't know how to complete them, it slowly became a desire to protect people Taro acquired from the knights. He had heard about things like romance, and love and wanted to have that. While he had his programmed feelings for Merlin, they began to grow into something genuine during his time in her service. 

When the Sins had been formed, Merlin had decided to release Taro from her service for the time, however, Taro never fully left her service. He would travel the world helping and protecting people, and every so often he would find his way back to Merlin to present her with things he found that he thought could help her, or trinkets of his gratitude to her for the life he had been given, and the feelings he came to have. 

During the time when the kingdom turned on the Sins, Merlin would find her way to Camelot, helping the Young King Arthur. Merlin would then remember Taro, and she sought to find him. He was brought with her to the kingdom of Camelot and given a role as a knight, protecting the kingdom, and Arthur. 

Once Elizabeth sought out Meliodas, Merlin was aware that the Sins were all going to come together, and the signs of Holy War were gathering. She sent Taro away from her, needing to stay with Camelot for the time being, and tasked Taro with helping the rest of the Sins in her absence. 

Taro then went on to find Meliodas and explained to him that he knew Merlin, not going into too much detail since he had been a project that Merlin kept secret. Meliodas just let him help with them, knowing there was more to Taro, but going with it, for the time being, needing all the help he could get. 

Pairing: Merlin 

Powers: Despite her cynicism, Merlin was enamored with the idea of a fairy tale come to life loving her, and so this influenced the creation of Taro, down to his powers, based on the abilities the fairy tale was stated to have. However, due to the tale being older, there were several translations, and so Merlin gave Taro three 'Configurations' which is the name of is innate magical ability. Taro has the ability to change between the following three forms, with different abilities depending on which one he is using at the time, with his normal mode outside of combat being referred to as 'Growth.' 

Growth: The day to day life form of Taro when he is resting, or when he is not in a fight. If he is knocked out or sleeping, this is the form he will return to. It doesn't take any magic to sustain. In this form, he has no fighting abilities, beyond that of someone in the physical prime of their life, but nothing beyond that. 

Power Configuration: In the Power Configuration, Taro grows in height, going from 5'5 to 6'0 even. His muscles also expand, and he gets a lot stronger physically and is able to endure more damage. His reflexes also improve, as does his combat speed. In this Power Configuration, Taro's magic shifts to be more offensive, with a series of attacks called 'Stobium' which is fire-based magic that enhances his attacks or can be used to attack it's own. 

Miracle Configuration: In the Miracle Configuration, Taro shrinks in height, going down to 5'0. His muscles shrink, and he loses some of his physical power and his durability, in exchange for a boost in speed in and out of combat. In the Miracle Configuration, Taro's magic changes to wind-based magic, called 'Luna' which Taro uses to fight, move faster or to protect others. 

Glitter Configuration: The Glitter Configuration is Taro's strongest form, which combines the best abilities of the Power and Miracle Configuration and amplifies them. However, it takes a massive drain from him, and he can only sustain it for about three minutes at a time if he really forces it. After using the Glitter Configuration, Taro will return to Growing, and be unable to move for hours, or days at a time depending on how long he used it for. 

Weapon: Acrosser- Acrosser was the weapon given to Taro by Merlin when he was created. The Acrosser is a greatsword, which is capable of performing high-level analysis of an enemy to help Taro figure out which Configuration to use, and how to fight with it. If Taro is caught in a fight when he is in his Growing form, the Acrosser will temporarily take control of his body to take him to safety. The Acrosser is semi-sentient, doing what it can to protect Taro at all times, usually moving on it's own to block an attack.