Kosane Kiriha

Kosane Kiriha
Japanese Name	霧羽こさね (Kiriha Kosane)

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Kosane Kiriha (霧羽こさね) is the protagonist of Null Magical Girl. She is an unemployed graduate student attending university to pursue a Master's degree, where the title of her Master’s thesis is “A Study of the So-Called Cognitive Revolution.” Ten years ago, Kosane attempted to make a contract with Kyubey, but the process failed as she didn't possess a soul (and later discovers she doesn't have a brain either). Despite this, she is paradoxically considered to be both a magical girl and not one.

General Info

Physical Features
Age	24
Eye colour	Amber
Hair colour	Ash Blonde
Magic
Soul Gem	Does not have one
Weapon	Rifle of the Inner World
Witch Form	Unknown
Powers and Abilities	None
Wish	“To divide and proliferate”
Other
Japanese pronoun	Watashi
Known relatives	Eruna Kiriha (twin sister; stillborn), unnamed parents
Origins	Unknown
School	Unknown university; Master's Program

In Null Magical Girl

In Null Magical Girl, Kosane acts as the main character. Additionally, the story is told primarily through a first-person perspective. After a head injury, she discovers that she has no brain, and instead is controlled by a lump of incubator cells on the back of her neck. Kyubey crawls inside her empty skull and discovers a letter from Eruna, which is then folded into a ticket to the Time Railroad. Kosane and Kyubey are teleported to the train, where Kosane is attacked by a group of magical girls and passes out.

Kosane is then helped by Coeurl, a magical girl from the planet Terminus 800,000 years in the future, where the last remnants of humanity are hiding out from Homo Magica, a unique species evolved from human magical girls. Homo Magica has begun colonizing the cosmos, and Coeurl asks Kosane to find another intelligent species to turn into magical girls. Kosane discovers a wide variety of alien creatures, but none of them are deemed good enough candidates to become magical girls. Ultimately the Homo Magica destroy Terminus, and Kosane is left alone in the void of space with Kyubey, who has now self-replicated into a whole group of Kyubeys. She eventually makes it back to the Time Railroad, but the train is overloaded and explodes, causing her to somehow fuse with the Kyubeys and the Railroad itself.

With the fusion, Kosane becomes like a god. She can travel through time at will and repeat moments in time. However, history will always play out the same way due to Eruna's interference.

Powers and Abilities

Kosane herself doesn't have any supernatural abilities like other Magical Girls, but instead is a prime candidate for genetically engineering by Kyubey. Because of Kyubey, Kosane lost the human ability to read emotion and also gained the power of flight for a short time. She is eventually fused with Kyubey and gains the ability to see different timelines as well as travel through time, reliving the year 2021 in a similar manner to Homura Akemi. She also gains the ability to make contracts, which she uses to contract herself and Eruna as mere zygotes.

Etymology

'Kosane' is likely a reference to The World of Null-A - the novel's main character's surname, Gosseyn, is stated to be pronounced "go sane" by the book's author. This is also confirmed by another tweet by Gengen Kusano.
- "Kosa" (こさ) is similar to the term ごさ (an alternate writing for kanji meaning "error, discrepancy").
- "Sane" (さね) is an alternate writing of kanji that means "truth" or "reality".
- Moving the last syllable to the front like Eruna's name (but excluding "-sa") creates "neko" (ねこ), an alternate writing of kanji meaning cat. If intentional, this may reference Incubators and/or Coeurl (named after a cat-like creature similar to Incubators).
Her surname Kiriha (霧羽) is comprised of kanji 霧 ("mist, fog") and 羽 (originally referred specifically to where the quill of a feather attaches to the skin, then broadened to mean "feather", and then further to "wing").