This page contains a list of information and tropes about minor characters in Fate/Prototype.
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Hiroki Sajyou
Voiced by Hiroki Tochi
The father of both Manaka and Ayaka.- But Not Too Foreign: He has foreign blood mixed in him, though what the other half of his ancestry is aside from Japanese is never stated.
- Disappeared Dad: Towards Ayaka, having died in previous Holy Grail War.
- Good Parents: Hiroki was this towards both his daughters when his wife was alive. He regrets that he couldn't be the best father to both after she passed away.
- The Mourning After: His wife's death affected him deeply. It caused him to bury himself in his lifestyle as a magus and resulted in him acting less like a father towards his daughters in the process. He regrets this however.
- Narrator All Along: It's revealed at the end of the final Fragments arc that he was the one writing all the extracts from an old notebook.
- No Name Given: In the OVA. His first name was finally revealed in the prequel series.
- Parental Favoritism: Averted. Though he favors Manaka as a magus thanks to her talent, and would have picked her as his heir had she been born with more magical circuits, it's made clear that he loves both his daughters and is only strict with Ayaka because he's worried about her future.
- Posthumous Character: Died in the previous war at the hands of Manaka herself.
- Virtue Is Weakness: He ordered Ayaka not to talk to or sympathize with animals, saying it is a waste of time, especially since they use the animals as sacrifices.
Tamaki Kitano
Voiced by Aimi Tanaka (Drama CD)
The little sister of Tatsumi Kitano.- I Will Wait for You: Unaware that Tatsumi is dead, she spends every night sleeping in his apartment, desperately waiting for him to come back. Her parents eventually force her to stop, leaving her in tears.
- Locked Out of the Loop: She is unaware of the supernatural, the Holy Grail War, and even that Tatsumi is dead.
Luca
Merlin
Voiced by Ayako Kawasumi (Drama CD)
The court magus of Camelot and advisor to King Arthur. Unlike in the prime Fate/stay night universe, this Merlin is actually female.
- Ascended Extra: Becomes this in her Fate/Grand Order Arcade debut.
- Casting Gag: Shares the same voice actor as Artoria, Arthur's Gender Flip, in the Fate/Stay Night universe.
- Gender Flip: Of Fate/Stay Night / Fate/Grand Order Merlin.
- The Unseen: Vaguely described as beautiful but otherwise her appearance is left a mystery. That is, until her debut in FGO Arcade.
Lucius Tiberius
Voiced by Yoshimasa Hosoya (Drama CD)
The "Sword Emperor" of Arthurian legend. A particularly vicious Caesar, Lucius clashed with Arthur many times in his attempt to reintegrate his kingdom back into the Roman Empire.
- Animal Motif: The Bear to Arthur's Dragon.
- Blood Knight: He really enjoyed fighting with Arthur. So much so that he even asks if there were any others like him in Britain since he planned on conquering it.
- Cool Sword: Wielded Florent, the "sister" blade of Arthur's Clarent, in battle.
- Evil Redhead: He was basically Arthur's opposite. Being cruel and arrogant, and seeking to conquer others for no reason other than because he believes it's his given right as an Emperor of Rome.
- A God Am I: Being an Emperor, he believes himself and others of like him such as Arthur to be gods on earth.
- No Body Left Behind: How Arthur defeats him, using Excalibur to literally wipe him off the face of the planet.
- Red Baron: Nicknamed the Sword Emperor.
- Shock and Awe: Florent has the ability produce lightning much like Clarent.
Mordred
Voiced by Haruki Ishiya (Drama CD)
The treacherous son of King Arthur who was responsible for the fall of Camelot.
- Antagonistic Offspring: As per the legends, he's this to Arthur.
- Gender Flip: Though male like in the actual legends, he's this to Apo-Mordred as she was introduced first in the greater Nasuverse setting.
- The Unseen: Like Merlin, his appearance is left a mystery. One could assume he looks like Saber given that they're father and son.
- Yandere: A flashback in Fragments reveals that Mordred was even more extremely obsessed over his father Arthur than the Mordred of Artoria's timeline. To the point, he wanted to destroy everything Arthur cared about until he only had Mordred to focus his attention on.
Moses
Voiced by Megumi Ogata (Drama CD)
The foster brother of Ozymandias who eventually became his greatest rival.- Age Lift: In the Bible, Moses was around 80 years old when he confronted Pharaoh to free the Israelites from slavery. Here, he's a pretty young man in his early adulthood.
- Expy: Started out as the Enkidu to Ozymandias' Gilgamesh, but the two broke off their friendship due to political and ideological differences.
- Martial Pacifist: Was an inheritor and practitioner of "Jacob's Limbs," an anti-angel martial art.
- Summon Bigger Fish: As Ozymandias' gods were very real in this setting, Moses invoking his god's powers to smite the nation with plagues that polluted the source of the Egyptian pantheon's might as well as the kingdom's various resources. Ra, Horus, and the rest were unable to stymy the sequential onslaught with even their precious sun being blacked out by divine darkness.
- We Used to Be Friends: His love of the Egyptian royal family was ultimately put aside so he could free his people.
Nefertari
Voiced by Manaka Iwami (Drama CD)
Ozymandias' wife who makes an appearance in his flashbacks.- Happily Married: With Ozymandias.
Sigurd
