Sella is a Homunculus created by the Einzbern family, she was amongst failures in the creation of the Holy Grail. Originally she was meant to be scrapped, but she was given a new life as Illya's maid and teacher.
While she was made on the basis of the same shape as Leysritt, Sella was made as a pure homunculus two years ago with normal alchemy. Unlike Illyasviel and Leysritt, Sella is not a miracle of the Einzbern family, but a homunculus with perfect efficiency.
Despite her appearance, she is only about two years old. She usually wears a maid outfit with a hood that makes her appear almost identical to Leysritt; in casual clothing, she is revealed to have long pale hair, a characteristic of Einzbern homunculi.
Sella is highly protective of Illya, whom she loves and cares for deeply, and thus is very suspicious of Shirou Emiya.
Despite her apparent coldness to everyone but Illya, Sella is actually rather fickle and insecure, particularly about her body, and Leysritt and Illya often tease Sella for her harsh personality. Unlike Leysritt's difficulty expressing herself, Sella has clear emotions and does not hesitate to show her displeasure towards Shirou.
She tends to throw away her humanity in order to protect Illya, but she is unusually friendly to plants and animals. She usually distances herself from humans and prefers to take care of the flora and fauna of the castle.
As Illya travels to Fuyuki city for the Fifth Holy Grail War, she brings along her two maids Leysritt and Sella. Sella is in charge of the management of the castle courtyard, she tends the flower bed to establish hope for Illya there.
Unlimited Blade Works Edit
Her role is expanded in the anime adaption. Sella disapproves Illya when she spared both Shirou Emiya and Rin Tohsaka when she returned after their first encounter. Sella complained to Illya that she could have defeated both of them easily. She believes Illya should at least killed one of them, upon revealing Berserker's God Hand noble phantasm. Sella realizes that Illya pity for Shirou.
When Rin and Shirou went to the Einzbern territory to seek an alliance. Sella was against the idea to invite them and insist Illya as the lord of the castle, should drive them away. Sella lectured Illya that she should act more like the Einzbern princess and should send out invitation, and throw an evening party, in keeping with proper decorum. Sella sighs as Illya orders both her and Leysitts to capture both of them. She and Sella found Shinji Matou in the castle's garden. Sella compares Shinji to a harmless fly and decides to deal with him before capturing Shirou and Rin. Sella threatens Shinji to either jump off the roof and flee or be slain by Leysritt's halberd. As they prepare to kill him, they were interrupted by Gilgamesh. Sella instantly felt threatened by Gilgamesh's presence and Sella orders Leysitt to escape. Sella refuses to allow Shinji and Gilgamesh to pass as she is determined to protect Illya. However Leysritt was murdered as Gilgamesh fired his weapons. After the battle, Sella was impaled with several swords and was heavily injured. Sella was determined to not let Gilgamesh go near Illya, as long as she draw breath. She was decapitated by him.
Fate/kaleid liner PRISMA☆ILLYAEdit
Leysritt and Sella both appear in Shirou's route. Sella, Celebloomers and Leysitt arrived in Fuyuki City. Sella informs Celebloomers about the preparations have been made for her press conference. As they went to the conference, nobody was there and Sella ask if Leysitt has informed the Japanese government about their arrival. They encounter both Shirou and Shinji, Shinji tells Shirou about Celebloomers being the Capsaba champ who uses the orthodox financial-power style, famous for annihilating her opponents with a deck put together by using money.
After Shirou beats Celebloomers, Sella tries to comfort Celebloomers to not be discouraged. However Sella would be grateful if Celebloomers would take this as an opportunity to grow out of this worthless game. When Gilgamesh presented Galactica Saber Final Edition, Celebloomers collapsed and Sella was concern for her well being.
She appears in Berserker's First Errand episode 5 where she drags her Leysitt back home when Leysitt was secretly following Berserker. She appears briefly in the last episode of Carnival Phantasm where she was talking to Kohaku.
She was briefly mentioned in Leysritt's story in Fate/unlimited codes, where a weakened Illya tells Leysritt to escape with Sella.
The ability of her body is inferior to others, but she makes up for it with superb magic circuits. As a magic teacher, she is superior, but as she is a fragile homunculus, Sella is unsuitable for battle.
Creation and ConceptionEdit
In early drafts, the caretaker of Ilya was a tuxedo-wearing German man; someone akin to the wonderful man who nagged at Shirou and Rin incessantly. Sella made her appearance because some artistic director insisted on it and made a huge scene about it.
- In the first Popularity polls of Fate/stay night in 2004, Sella was ranked 30th.
- In the second Popularity polls of Fate/stay night in 2006, Sella was ranked 22nd.
- In the Type-Moon's 10th Anniversary Character Poll, Sella was ranked 149th.
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14
 Fate/complete material II: Character Material - Characters: Sella, p.112
Character Data 022
Affiliation: Illya's Maid
Three sizes: B75/W58/H79
Image Color: White (Blue)
Talents: Magecraft, Home teaching
Likes: Providence, elegance, Sweet things (like cheap)
Dislike: Certain strangeness
Worst enemy: Leysritt
セラ - 魔術師として優れた素質を有するイリヤの教育係
Character Data ０２２
- ↑ 2.0 2.1
 Fate/side material - Encyclopedia: Illya's Maids [Others], p.055-56 [T]
Illya's Maids [Others]
The maids serving Illya.
These maids made their appearance because some artistic director insisted on it and made a huge scene about it.
Sella was responsible for Illya's education, while Liz was Ilya's bosom buddy with whom she talked to.
By the way, did you know the secret that Liz had one of the biggest sets of breasts in Fate?
Basically they were failures in the creation of the Holy Grail. Originally these homonculi were set to be scrapped, but were given new lives as caretakers of Illya.
Here were some trivia. In early drafts, the caretaker of Illya was a tuxedo-wearing German man; someone akin to the wonderful man who nagged at Shirou and Rin incessantly.
 Fate/complete material III: World material - FAQ with Nasu: Holy Grail War, p.131
Q: What is Illya’s capacity as a Grail?
Q: What is Illya’s capacity as a Grail? Hypothetically, if the Einzbern won the War, Illya absorbed the other 6 Servants besides Berserker, and had some shred of human will left, could she still don the Dress of Heaven and initiate the Grail ritual?
A: That’s what Liz and Sella are for. Illya can only take up to 4 - I would think that absorbing a fifth Servant wouldn’t allow her to function as a human any longer.