Sayaka Miki

Sayaka Miki (美樹 さやか *Miki Sayaka*?)
Voiced by: Eri Kitamura (Japanese), Sarah Williams (English)
Sayaka is Madoka's classmate and best friend, a second-year at
Madoka's school. She is a lively tomboy with strong ideals of love and
lawfulness. After helping Madoka rescue Kyubey, she contracts with him
to grant her wish to heal the wounded hand of Kyosuke Kamijo, a young
violinist that she is infatuated with, visiting him daily in the
hospital. As a magical girl, Sayaka's weapon of choice is a cutlass,
being able to produce multiples of them at a time. She also has an
extraordinary regenerative ability due to the healing nature of her
wish. Sayaka insists that her wish is selfless and feels that fighting
witches to save people is a bonus, even after witnessing Mami's death.
As Sayaka's ideals are put against the reality of her wish's
consequences and the stress of fighting, her view of the world is slowly
 corrupted. She becomes hateful and distrustful towards others,
including Madoka, whom she lashes out at and accuses of being selfish.
Because of this, Sayaka seems to be based off the original story of the
Little Mermaid, because like the little mermaid who saves the prince
from near-death, Sayaka heals Kyousuke; like how the little mermaid
gives up her tongue to become a human and get the prince to fall in love
 and marry her, Sayaka gives up her humanity so she can heal Kyousuke
and also get him to fall in love with her; like the prince instead falls
 in love with another princess and breaks the mermaid's heart, Kyousuke
falls in love with Hitomi, breaking Sayaka's heart; Finally, like the
little mermaid is told to kill the prince and have his blood drip onto
her feet so she can turn back into a mermaid, but doesn't and turns to
sea foam, Sayaka refuses to cleanse her tainting Soul Gem, causing her
to turn into a witch, who is like a mermaid.

After learning that her soul is no longer in her body, but in her
soul gem, Sayaka starts to believe she is a zombie; and when her friend
Hitomi confesses to her about her love of Kyosuke, Sayaka falls into
isolation and refuses all help. In her despair, she loses faith in
humanity and justice, making her give up on her ideals and herself; thus
 leading to her soul gem becoming fully corrupted, turning into a grief
seed, making her into the witch known as **Oktavia von Seckendorff** (オクタヴィア・フォン・ゼッケンドルフ *Okutavia Fon Zekkendorufu*?),
 the mermaid witch, an armored mermaid witch with her barrier resembling
 a concert hall, where a figure similar to Kyosuke is playing among
faceless figures. Though Kyoko and Madoka attempt to communicate with
her, they realize that they can't do anything to save Sayaka. Kyoko then
 performs a powerful attack to finish off Oktavia, taking her life along
 with the witch's.

Despite Madoka's reworking of the world in the final timeline,
Sayaka still makes a wish in the new world, and thus ends up
disappearing after exhausting her soul gem. Despite this, however,
Sayaka does not regret her wish, and hopes that Hitomi will make Kyosuke
 happy, before leaving with Madoka to the afterlife.

In *Rebellion*, Sayaka assists Madoka and Nagisa in saving
Homura, and has received knowledge of all previous timelines as a result
 of becoming a part of the Law of Cycles. She shows the power to summon
and manipulate witches, including her own witch form Oktavia, though she
 can control Oktavia independent of her body, unlike Nagisa. Sayaka
states that she became an assistant of Madoka because she "regretted
leaving Kyoko behind".

At the end of *Rebellion*, Sayaka and Nagisa were pulled from
afterlife by Homura, and given a new life and human forms in the new
world. Unlike Madoka and Nagisa, Sayaka retained all her memories in the
 new world, however Homura took these away too after their
confrontation. Even so, Sayaka promises that she will never forget that
Homura is a demon.