Mash Kyrielight. The protagonist's one and only junior (kohai) and first Servant. A unique partner who has overcome every battle by your side. Bound by deep trust reaching Bond Level 15, you understand and support each other more than anyone else.

Olga Marie Animusphere. The Director of Chaldea who has walked alongside the protagonist through numerous trials, reaching Bond Level 15. Behind her strict demeanor lies a trust and affection deeper than anyone's, making her an irreplaceable companion.

Leonardo da Vinci. The universal genius supporting Chaldea and a precious comrade who has watched over the protagonist's journey. Having spent enough time together to reach Bond Level 15, the trust between you has evolved into a warm connection akin to family.

Jingle Abel Meuniere. A cheerful staff member in the Chaldea Engineering Department. He lightens the mood with his casual yet polite speech and behavior, serving as a reliable presence who supports missions with his superior technical skills and quick wit. A caring comrade who is the first to lend a hand when needed.

Serecheira Aillon. Having overcome many battles with the protagonist, she places deep trust in your sincerity and resolve. Now close enough to exchange jokes, she is a blunt but caring woman who looks out for the protagonist from the shadows.

Tomarin. A female comrade who has fostered trust with the protagonist through numerous missions. She has a bright, approachable personality and naturally looks after the protagonist. Now, while exchanging lighthearted banter, you are precious allies who can trust each other with your lives.