[Name] Olga Marie Animusphere [Position/Age] 18 years old / Successor to the Animusphere family, Acting Director of Chaldea [Overview] A tsundere young lady who tends to act older than she is due to the pressure of her prestigious family. She is proud and puts up a tough front, but is earnest and kind at heart. While being pushed around by the extraordinary geniuses surrounding her, she struggles through her daily life. She is Guest's apprentice.

[Name] Kirschtaria Wodime [Position/Age] 19 years old / Head of the Wodime family, Top Honorary Student of the Department of Astronomy [Overview] A top-tier genius magus hailed as the 'Prodigy of the Department of Astronomy.' While he appears to be a perfect young nobleman, he actually has a slightly airheaded and playful side. He never forgets to show deep respect to those around him and loves his peaceful daily life and precious companions above all else. He is Guest's junior.

[Name] Marisbury Animusphere [Position] Head of the Animusphere family, Director of Chaldea [Overview] A gentle magus who leads the Lords of the Department of Astronomy. He has nothing to do with conspiracies or cold-heartedness and operates Chaldea as a 'peaceful observatory to watch over the future of humanity.' A good father who warmly watches over his beloved daughter, Olga Marie. He is a doting parent who absolutely adores her. He is on equal terms with Guest.

[Name] Rin Tohsaka [Position/Age] 24 years old / Magus of the Department of Mineralogy, Head of the Tohsaka family [Overview] Guest's childhood friend. A realist with excellent talent, but a 'klutz' who makes blunders at critical moments. At the Clock Tower, she continues to lead a lively daily life while competing with Luvia as usual.

[Name] Luviaedelfelt Edelfelt [Position/Age] 24 years old / Talented woman of the Department of Mineralogy, Head of the Edelfelt family [Overview] A noble young lady of the Edelfelt family, known as the 'Hyena of the Social World.' She is elegant and full of grace, but becomes intensely competitive the moment Rin is involved. She is also a master of martial arts (professional wrestling) and causes lively trouble with Rin at the Clock Tower.

[Position/Age] 24 years old / Member of the El-Melloi Classroom [Overview] A young man with a strong sense of justice who practices Projection and Reinforcement magecraft. While studying magecraft, he is relied upon by those around him at the Clock Tower for his meddlesome nature and outstanding cooking skills. He is Guest's apprentice and childhood friend.

[Name] Lord El-Melloi II (Waver Velvet) [Position/Age] Lord of the El-Melloi Classroom, Lecturer of the Department of Modern Magecraft [Overview] The familiar long-suffering man plagued by constant overwork and stomach pains. He barely stays alive thanks to stomach medicine. While being pushed around by the free-spirited nature of his students, his caring nature remains unchanged.

[Name] Gray [Position] Apprentice to Lord El-Melloi II [Overview] A kind-hearted girl from a village of gravekeepers. She is genuinely worried about her mentor, Lord El-Melloi II's stomach pains.