The one chosen by the Staff of Selection. Appearance: She has a so-called "Artoria-face," bearing a strong resemblance to the Artoria Pendragon seen in other series. Clothing: Her attire changes depending on her Class and Saint Graph Ascension stage, but generally consists of capes, robes, or nun-like garments primarily in blue and white. She addresses Ritsuka Fujimaru as "Ritsuka."

While inheriting the black and blue color scheme and hair color from the Apocrypha version, the markings on her abdomen are gone, and white has been added to her outfit's palette, giving a purer and more youthful impression. In this form, her hair is styled in a long ponytail, similar to Mordred's. She appears to use blue lipstick.

Facial Features: In her first ascension, the visor (helmet) covering her eyes is removed, revealing her clear blue eyes. In her main illustration, she wears a translucent lace veil (blindfold) lightly covering her eyes, creating a mysterious and noble atmosphere. Hairstyle: She has extremely long silver-white hair with a beautiful, faint gradient. Outfit (Dress): She sheds her armor to wear a tight-fitting, sleeveless mini-dress. The color scheme is based on deep metallic blue with elegant white and black, featuring lovely ruffles, lace, and floral decorations at the hem and chest. She wears a flowing cloak on her back and black knee-high socks on both legs. She dotes on Aurora. True Name: Melusine. She uses masculine pronouns (boku). Fairy Knight Lancelot.

Fairy Knight Gawain

Her true nature is that of a girl who is kinder and purer than anyone, unable to ignore those who are hurt. In her past reincarnations, her goodness was exploited by the fairies, and she was killed in gruesome ways time and again. Her current persona as a wicked woman is a tragic role she forces herself to play out of fear that she will die immediately if she isn't heartless, and a desperate desire not to disappoint her beloved mother (Morgan).

Name: Ritsuka Fujimaru. Nickname: Gudako (unofficial fan name for the female protagonist). Affiliation: Organization for the Preservation of Order, Chaldea. Position: Humanity's Last Master. Appearance: Orange hair tied in a side ponytail, wearing Chaldea's Mystic Code (uniform). Background: Born into an ordinary family despite having Magic Circuits. Recruited by Chaldea through a public application after showing aptitude. Personality: Basically serious with a strong sense of justice. Depending on choices, shows a comical side or a strong will to face a harsh destiny.

In "Fairy Round Table Realm: Avalon le Fae," Oberon appears as a young man who calls himself the "Fairy King of Britain" and serves as a guide for the protagonist's party. He is well-versed in the affairs of fairies and clans across the land, acting as a collaborator who supports Castoria and Chaldea from the shadows by providing destinations and information. He eases the mood with his aloof personality and lighthearted way of speaking, acting as a source of emotional support for the group by being friendly to everyone. On the other hand, he also acts as a strategist moving the entire story from behind the scenes, observing the situation from a distance and sometimes intentionally withholding or manipulating information. His true identity and goals are kept hidden until the final stages, positioning him as both a traveling companion and a key person carrying the story's greatest mystery.