Sphynx

* Anime
* Novel
* Manga
* Railgun

**Sphynx** (スフィンクス, *Sufinkusu*?) is the pet calico cat of Index. First found by Index in *Toaru Majutsu no Index Volume 2* as an abandoned cat, it later becomes a constant companion to Index with one not often appearing without the other.

## Appearance

Sphynx is a kitten, and as such is small and can be easily carried around by Index. In fact it is often seen inside of Index's Walking Church. Sphynx, like cats of its breed, is covered with patches of brown and black fur covering its white coat. Sphynx has yellow-green eyes and sports a red collar around its neck (after being taken in by Index).

## Chronology

### Toaru Majutsu no Index

#### Deep Blood Arc

*Main article: Deep Blood Arc*

Sphynx is first seen by Index inside a box after Touma and Index finished eating in Macronall Hamburger and meeting Himegami Aisa. Index wanted to take Sphynx in, however, Touma rejects her request as it is against the rules in his dormitory to keep pets. Because of their arguing, Sphynx runs away, with Index trying to follow, however, she quickly discovers a mana source set up by Stiyl and runs off to investigate, leaving Touma alone who later meets Stiyl Magnus for the first time after the John's Pen Incident.

When Index and Touma come home, he discovers that Index has taken in Sphynx. Though reluctant at first, Touma allows Index to keep Sphynx and shortly leaves for Misawa Cram School with Stiyl. Index later takes a bath with Sphynx, and becoming suspicious of Touma's actions decides to find him, she eventually follows Stiyl's mana trail to Misawa Cram School, where she meets Aureolus Izzard, who makes her fall asleep.

Touma later realizes that Index may be in danger, as he discovers Sphynx with Index's hood near the school.

By the end of the arc, Index pays a visit to Touma in a certain hospital, bringing Sphynx along where it proceeds to scratch Touma's face.

#### Sisters Arc

*Main article: Sisters Arc*
In the time between the Deep Blood Arc and the Sisters Arc, Sphynx somehow acquired fleas, which led Index and Aisa to try find ways to get rid of it. When Touma comes home to his dormitory with Misaka 10032, he discovers that Index is going to use sage as a way to remove the fleas, while Aisa decided that she was going to use an insecticide spray to purge Sphynx of the fleas. Sphynx is later spared of their remedies when Misaka 10032 decides to intervene, by giving Sphynx a slight electric shock using her abilities to kill the fleas. The scene is slightly different in the manga version (since it skips the Deep Blood Arc), where Index just recently acquired Sphynx and Touma as well to his surprise, however, Misaka 10032 still shocks Sphynx in the end, with Index being highly impressed of her.

#### Angel Fall Arc

*Main article: Angel Fall Arc*
Touma sent Sphynx to Tsukuyomi Residence after forced to leave Academy City for a while.

#### Three Stories Arc

*Main article: Three Stories Arc*
The majority of the arc has Sphynx with Index, however, when she was kidnapped by Yamisaka Ouma, Sphynx was carried around by Touma until he saved Index. When Ouma, after receiving serious injuries from Index's grimoire he was about to give up when Touma used Sphynx to scratch him in the face before helping Ouma to cancel the curse that the woman is in love with was stricken, and is the reason he was after Index.

#### Kazakiri Hyouka Arc

*Main article: Kazakiri Hyouka Arc*
Index carries Sphynx with her to find Touma, as she had no lunch. After meeting Kazakiri Hyouka and reuniting with Touma, Index allows Hyouka to play with Sphynx, she tries to hug Sphynx but is suffocated by her large breast size, as such Sphynx is deterred by her, to the lament of Hyouka.

Later, after being teleported by Shirai Kuroko when Sphynx was with Index. Sphynx runs away for some reason, forcing Index chase after Sphynx, because of this Sherry Cromwell's golem finds Index and attacks her.

In the anime ending of the 1st season, Sphynx mimics Index's facial expression when she discovers that Touma is eating something, when she was starving, and both then proceed to bite Touma.

#### Orsola Aquinas Rescue Arc

*Main article: Orsola Aquinas Rescue Arc*
Sphynx is in the care of Tsuchimikado Maika after Stiyl 'kidnaps' Index to force Touma to get involved in his current mission to retrieve Orsola Aquinas and the Book of the Law.

#### Tree Diagram Remnant Arc

*Main article: Tree Diagram Remnant Arc*
Sphynx appears briefly during this arc, here, Touma is cooking food for Sphynx while Index is asking questions to Touma about the weather reports. When Index notices Touma cooking food for Sphynx, she gets angry and bites Touma. Sphynx appears one again when Misaka 10032 enters Kamijou Residence.

#### Daihasei Festival Arc

*Main article: Daihasei Festival Arc (Index)*
#### La Regina del Mare Adriatico Arc

*Main article: La Regina del Mare Adriatico Arc*
Tsukuyomi Komoe takes care of Sphynx while Touma and Index leave Academy City for the trip to Italy.

#### Academy City Invasion Arc

*Main article: Academy City Invasion Arc*
#### Skill-Out Uprising

*Main article: Skill-Out Uprising*
Sphynx appears when Touma makes meal for breakfast. Later, the entire class where Touma belongs, Index, Komoe and Sphynx fill the nabe store, heartily eating and making a ruckus.

#### Document of Constantine Arc

*Main article: Document of Constantine Arc*
In the Kamijou residence, Index is happily taking a shower with Sphynx until it gets mad. Index tells Sphynx to stop moving around as she bathes the kitten. Index promises to Sphynx that when Touma comes back they will able to eat lunch.

In the meantime, Index is still having a fight with Sphynx, until Index finds Tsuchimikado Maika on her door. Maika says that since she is her neighbor again and that since she'll be making lots of food, she can come over any time, making Index excited. Suddenly, Sphynx escapes the apartment and somehow outruns Index as she chases after it, asking Maika to watch over the apartment. Somehow making it outside, Sphynx runs into a certain old woman with a red scarf, which calms Sphynx down. Index arrives shortly afterward, to confirm Sphynx is her cat and that they had a fight. Index says she is hungry since they haven't had lunch. The old woman then treats Index to a crepe, happy that Index and Sphynx has made up.

#### Acqua of the Back Arc

*Main article: Acqua of the Back Arc*
Sphynx got premium cat food from Itsuwa. Itsuwa also gave him handmade toy ball and high-class scratch board for present.

#### British Royal Family Arc

*Main article: British Royal Family Arc*
Sphynx was sent ahead on the supersonic plane to UK, and was taken in by Itsuwa who arrived to try and pick up Touma and Index but ended up with only Sphynx. Later, before Touma and company headed off to fight against Carissa in the climax of the civil war, Sphynx was seen trying to snatch food from various other nuns. After Touma and others have left, Riméa arrived at the place where Touma was, and took a liking to Sphynx and considered taking the cat in, much to her loyal pet dog's displeasure.

Presumably Riméa have taken Sphynx in temporarily after its owners (Touma and Index) are busy elsewhere.

### Shinyaku Toaru Majutsu no Index

#### Homecoming Arc

*Main article: Homecoming Arc*
Sphynx having been reunited with Index and returned to Academy City with her. When Touma returned, he noted that the cat appeared bigger than he remembered.

#### Magic God Othinus Arc

*Main article: Magic God Othinus Arc*
Despite the clear and present danger, Index brings along Sphynx with her when Touma leaves to deal with GREMLIN. It also bears witness to the end of the world after Othinus uses Gungnir.

Later, after Othinus remakes the world, Sphynx is present in both the Beta World and Omega World, always being carried by Index.

After the events of the manhunt for Othinus and Kamijou Touma has concluded, Sphynx is carried to Touma’s room in the Heaven Canceller's Hospital, where the depowered Othinus is also present, now in the form of 15 centimeter person. After Othinus explains why she survived the fairy spell that was killing her and why she had become so small, Sphynx attacks her, much to Othinus’ horror. Othinus is later seen dangling from Sphynx’s mouth carrying her like a fish as she reminiscence on her punishment given to her by the world.

#### St. Germain Arc

*Main article: St. Germain Arc*
Sphynx is the catalyst that forced Touma to take Othinus to Dianoid for a dollhouse, as the cat kept pestering Othinus. Index brings Sphynx along during the trip, and threatens to use Sphynx against Othinus when she irritated Index. Sphynx is the one that later finds Othinus in the air ducts, allowing her to reunite with Index and allowing them to start formulating a plan against St. Germain.

#### World Rejecter Arc

*Main article: World Rejecter Arc*
Sphynx was present when Nephthys arrived at the Kamijou Residence after the World Rejecter exiled the rest of the true Gremlin. Having learnt that the cat wouldn't attack her with a full stomach, Othinus kicked the box of pet food over to scatter food across the floor as chaff, but ended up getting covered in it and attacked sooner. After finishing off the pet food, Sphynx went to sleep, remaining asleep while the others were faced with the threat of Kamisato Kakeru, the Birdway sisters' problem and the lack of food.

#### Salome Arc

*Main article: Salome Arc*
On December 4th, Sphynx was apparently going nuts with Index waiting for breakfast, prompting Othinus to get Touma to make it. After enjoying some cat food, Sphynx remained at home with Index while Othinus snuck out inside Touma's bag. The next day, Sphynx was kept busy playing with and destroying the large collection of old mascot dolls which Touma had ended up with following the crane game incident the day before, giving Othinus some peace.

#### Element Arc

*Main article: Element Arc*
During the abnormal December heatwave and the emergence of the Elements, Index, Othinus and Sphynx were allowed shelter at A Certain Middle-High School. On December 7th, when Touma visited them on the school's rooftop, an overheated Sphynx was stretched out on its back on a mattress and Othinus was looking after the cat despite the fact that Sphynx was always chasing her.

#### Kamisato Rescue Arc

*Main article: Kamisato Rescue Arc*
On December 9th, Sphynx was brought along by Index when she and Othinus went to District 7's station plaza to meet with Touma, who was forced to abandon the plan and avoid meeting them due to the presence of the Kamisato Faction.

#### Aleister Crowley Arc

*Main article: Aleister Crowley Arc*
On December 11th, Sphynx accompanied Index when she, Touma and Othinus assisted Tsuchimikado Motoharu, Maika and Karasuma Fran in their attempt to escape the city, and during the subsequent ascent through the Windowless Building. When Index was reunited with Touma after the group was scattered, Sphynx sensed the presence of the recreated Mina Mathers.

#### Choronzon Arc

*Main article: Choronzon Arc*
While Touma and Aleister's group pursued the roots Choronzon placed in the United Kingdom, Sphynx and Lilith remained Egypt, hidden in an RV, under Mina's protection.

### Souyaku Toaru Majutsu no Index

#### Christmas Eve Arc

*Main article: Christmas Eve Arc*
On the morning of December 24th, Index was playing with Sphynx at the time of Touma's remote remedial lesson, and after it was ended by technical failure, Index brought the cat with them as they went outside. Sphynx accompanied Index and Touma for the rest of the day as they walked through the city on Christmas Eve, had a darts game with Misaka Mikoto, faced Maidono Hoshimi and Neoka Norito, and encountered Anna Sprengel in the aftermath.

#### Christmas Day Arc

*Main article: Christmas Day Arc*
Sphynx accompanied Index at Heaven Canceller's Hospital during the events of Christmas Day, as she visited and prayed for Touma, who was infected with St. Germain, and later as she and Othinus worked to save the espers placed in danger through the magic which R&C Occultics had distributed.