Ritsuka Fujimaru (Foreign Shielder)

Ritsuka Fujimaru is one of the main protagonists of the One Piece multi-series crossover fanfiction, Foreign Shielder.

Background
Ritsuka was born in Shibuya, Japan, but was moved to Brooklyn, one of the five boroughs of New York City, when she was 5. When she was only 16, she was taken to Chaldea to help erase all the Singularities that were breaking reality. Shielder was her first ever Servant, followed not long after by Assassin and Rider. Another year of fighting passed, the girl now 18, and she summoned Archer shortly before being called to take care of another Singularity in an alternate dimension. She accepted, barely managing to escape a fatal fall at the hands of Archer.

She spent several months wandering the place she found out was called the New World exterminating anyone with Devil Fruits and stockpiling them. Her group was dubbed the Grand Order of Chaldea (カルデアのグランドオーダー Karudea no Gurando Ōdā), usually called Chaldea for short. There were no bounties on their heads for the time they spent exterminating anyone threatening until she was approached by Donquixote Doflamingo. She refused his offer to sell the Devil Fruits she had, Archer appearing and protecting Ritsuka when Doflamingo tried to use his own Devil Fruit to force her into it.

Shortly after this, while searching for the epicenter of this entire Singularity (Blackbeard), Ritsuka realized she held romantic interest in Archer. This made their interactions and awkward, neither one wanting to break off the friendship, but they entered an unofficial relationship shortly after meeting Monkey D. Luffy, having been asked by early-on acquaintance Silvers Rayleigh to help him train.

Appearance
Ritsuka is a Japanese woman of average height with lightly tanned skin and golden eyes. Her hair is a dark shade of brown, always wearing the Chaldea uniform. She is relatively lean, described by some as slim.

Personality
She tends to be a very warm and kind individual, almost to the point of seeing ignorant. Many call Ritsuka naive, and though she can be dense, she is not stupid. She is especially good at reading others' emotions from tone to body language, this observant nature amplified by her Kenbunshoku Haki. She is very empathetic and prefers to avoid conflict, a trait that her Servants seem to collectively appreciate.

Relationships
Archer

From the start, Ritsuka has respected Archer immensely. He is charismatic, mentally strong, steadfast, and while frustratingly arrogant, will do what is necessary to achieve his goal. They became fast friends, Archer not afraid of admitting he trusted Ritsuka a great deal. Ritsuka has developed a habit of asking Archer to tell her more about his world, and he will almost always comply, seemingly finding it amusing and endearing. He has sworn to protect her, just as she has sworn to do whatever she can to protect and help him.

Ritsuka, not wanting to make him uncomfortable, asked him very early in if he had something he would prefer she call him. When he said no, she began calling him "Mister Dess." In return he calls her "Master" or "Ritsuka." It is rare for him to use someone's actual name when referring to him, something Ritsuka didn't know until Shielder pointed it out to her.

After Archer saved her from Doflamingo, she felt a very distinct throb in her chest. After talking to Rider, they discerned she'd developed a crush, something Rider was none too pleased about but didn't voice his clear disapproval of. Not long after that, Archer noticed a change in her behavior. After a few more weeks, and after meeting Luffy, they finally talked it out, that interaction ending with them entering some unofficial and unspoken relationship.