I'm reading the Fate/Stay Night visual novel. Early on, in the Kotomine Church, you can reach a bad ending by choosing to have Shirou give up his Command Spells and withdraw from the Holy Grail War as a Master. He goes outside to sever his contract with Saber, who says that normally she would kill a Master who abandoned her. Shirou asks if she'll form a contract with another Master, and Saber says that Archer's Master (Rin Tousaka) should be able to bring out her full power. Upon parting with Shirou, she goes into the church, presumably to form a contract with Rin.

Also, in the 2006 Studio Deen Fate/Stay Night anime (I haven't reached this far yet in the visual novel, but I assume it's similar),

Kirei Kotomine commands both Zero Archer (Gilgamesh) and Stay Night Lancer (Cu Chulainn). I assume he was officially the Master of at least Lancer, since unlike Gilgamesh, Lancer would have required a contract to stay in the world.

But I can't remember if it was ever stated that he is the official Master of both, or if

Gilgamesh was maintaining his existence with his own mana, and just stuck with Kirei for his own reasons.

We do know that it's possible for a Servant to have two Masters, as, for a time, both

Kayneth and Sola-Ui are Masters to Lancer

in Fate/Zero. But are the scenarios above instances of Masters with two Servants? Would Rin have been able to make a contract with Saber while also maintaining a contract with Archer, or was Saber relying on her knowledge that Rin wanted her as a Servant, and would cut off Archer if Saber became available? Was

Kirei the Master of both Archer and Lancer, or only of Lancer, with Archer a free agent?

If the answer is yes, do we know how the situation with Command Spells works? I assume this isn't a problem for

Kirei, as he gained all the leftover Command Spells from previous wars when he found his father dying from Kayneth's bullet in Fate/Zero.

But would Rin have gotten an extra three Command Spells if she made a contract with Saber, or would she have to save the one she had left as a sign of her control over both Saber and Archer?

I'm still early into the visual novel, and I haven't yet seen the last four episodes of Fate/Zero, so please use spoiler tags as needed.

  • 3
    Caster was master to several servants at once in multiple routes and endings. As for Kirei, Lancer is the servant of another master that was killed by Kirei. He took her arm and its command seals, and that's how he controls Lancer. Oct 19, 2014 at 6:37
  • @zibadawatimmy So Kirei is actually not Lancer's Master, but has found a way to pirate Lancer's original Master's Command Spells? By the way, your point about Caster is interesting; maybe you could expand that into an answer?
    – Torisuda
    Oct 19, 2014 at 21:55
  • @Torisuda is revealed in Fate/Hollow Ataraxia in how he was originally Bazett's Servant and that she was the Master Kotomine betrayed. most likely after that Kotomine then transferred them from her severed arm to himself
    – Memor-X
    Oct 19, 2014 at 22:10

2 Answers 2


It should be possible. However most of the examples i can find are non-human.

In Fate/Apocrypha we learn that the entire Red faction, save Mordrid, is under Shiro Kotomine's control since their Masters aren't in Trifas and he has been working on taking control; I remember reading that he has their Command Seals. The reason he can do this is probably because

He is the Ruler from the 3rd War as such a Servant with a connection to the Grail

As zibadawa timmy mentioned, in Unlimited Blade Works Caster had Assassin, Archer and Saber as her own Servants. However with Assassin she was a Fake Master, but with the latter two, she became a proper Master after using her Nobel Phantasm Rule Breaker to null their contracts with their Masters.

The only Human example is with Sakura in the Heaven's Feel Route. She has a contract with Rider (from the beginning) but she also, when she accepts Angra Mainyu, is the Master of Alter-Saber and Blind Beserker. However there is the possibility that Sakura was in fact a Servant herself with Angra Mainyu as the Master

The above three are evidence of how a "Master" can have multiple Servants under the Fuyuki system; there are examples outside that.

In the Moon Cell, the Alter Egos created by BB are her Servants. However BB is an AI and the Moon Cell/SE.RA.PH operates differently than the Fuyuki Holy Grail which is supposedly what it used to develop the system to determine who was worthy to reach the Moon Cell's core.

There is also Manaka Sajyou from Fate/Prototype. She not only is the Master of Beast but she also ends up summoning the other 6 Servants. However

When she died eight years ago, she became something of a half-zombie due to the power of the Holy Grail

As such, one can't really consider her a normal human.

When it comes to Command Spells, if a Master contracts with another Servant they are granted a set. However this is only seen with Caster.

Upon using Rule Breaker to steal Saber's contract, she appears to be branded with actual Command Spells.

Source: Special Command Spells - Imitation Command Spells

We can assume that it was the same happened with Archer and we can assume the reason is the same as if a Master-less Servant found a new Master (in the case of Caster).

  • +1, a very complete answer. It makes sense to think that if Caster made contracts with multiple Servants after nullifying their original ones, Rin could also have made a new contract with Saber after Saber's contract with Shirou was nullified, while maintaining her contract with Archer.
    – Torisuda
    Oct 19, 2014 at 22:18
  • I believe the VN asserts that the issue with modern magi is their prana capacity. The grail provides most of what a servant needs, but the master must still supply their servant with energy. This is a significant drain if they want their servant to be at their best and be able to use their NP. The drain can be lethal in Berserker's case. Caster and the other examples you mention have capacities well beyond a modern magus, so they can handle multiple servants. The fate franchise has many rules, but a theme is that they can all be broken. @Torisuda Oct 21, 2014 at 7:00
  • @zibadawatimmy So it's theoretically possible, but practically impossible for a modern magus? By the way, do you know if it makes any difference if the Servant has a high independent action stat, or if it might be more possible with weak-ish Servants? (In both cases I'm thinking of Emiya-Archer.)
    – Torisuda
    Oct 21, 2014 at 19:46
  • I'm going to accept this answer since it establishes that there doesn't seem to be a specific prohibition on one Master having two Servants, whatever else might come into play.
    – Torisuda
    Oct 21, 2014 at 19:47
  • @Torisuda actually i think there are some Modern Magi who could maintain contracts with Multiple Servants outside the Grail War, they would need very good Magic Circuits like Touko Aozaki who has Quality rank of EX and a Quantity rank of B+. not sure what Rin's and Sakura's but Rin i would say is average (before her rare traits) and Sakura is damaged (due to having her nature forcefully altered from Tohsaka standard to Matou Standard) and they are about the base line for maintaining a Servant's existance outside the war
    – Memor-X
    Oct 21, 2014 at 21:13

"Shirou asks if she'll form a contract with another Master, and Saber says that Archer's Master (Rin Tousaka) should be able to bring out her full power. Upon parting with Shirou, she goes into the church, presumably to form a contract with Rin"

I didn't remember it happening this way so I reread it. I was right, it didn't happen that way. First of all, when Shirou asks saber she says she will look for a master but she doesn't mention Rin. Secondly, at the end Shirou says saber disappears and goes away, he doesn't say anything about her going to the church. I am sure saber doesn't go to the church for 2 reasons:

A) it is just a few meters away. If she had opened the door to enter the church Shirou wouldn't think: she disappeared.

B) Saber doesn't want to go to the church (even with his master Shirou) as it gives off tremendously dark vibes. You'll know why later on.

Last of all, I doubt Rin would take saber. She says in the VN having 2 servants is a handicap (you weaken them a lot) and she never abandons archer. If archer were to die then yeah, she would most likely take saber if she's still available.

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