Misaka Mikoto/Chronology (Souyaku Toaru Majutsu no Index)

In December, demoralized and desperate after her encounter with the power of the High Priest and seeing the gap between herself and Kamijou Touma, Mikoto ended up walking a dangerous path, acquiring the Anti-Art Attachment and depending on it without realizing the hidden risks. During the abnormal heatwave and Element infestation, she suffered from witnessing attacks on her school and then receiving an attack from Aleister Crowley, but later managed to indirectly assist Touma in his battle against the Board Chairman, with assistance from Shokuhou Misaki. After the evacuation of Academy City, the two flew from Bali to the United Kingdom after learning Touma was in the middle of the worldwide chaos and became involved in the main conflict against Coronzon, culminating in the decisive battle which saw the two long-time masterminds leave the stage, and an unexpected struggle afterwards.

Having returned to the reactivated Academy City, Mikoto was soon faced with Christmas and the planned escape from Tokiwadai's strict oversight together with Shokuhou Misaki, the two having formed an alliance earlier in the month, with both intending and expecting initial cooperation followed by betrayal.

Christmas Eve Arc
Shortly after midnight on the morning of December 24th, Mikoto managed to escape from Tokiwadai's strict Christmas oversight by working together with Shokuhou Misaki and then abandoning her before she could be betrayed. She then encountered Kamijou Touma as he was escaping from some delinquents, carrying a naked girl who had filmed the group's attempt to rob an ATM.

Later in the morning, she ran into him again while fleeing from a group of Tokiwadai teachers and students. After hiding from her pursuers, she accompanied Touma and Index as they spent their Christmas Eve in the city (with Touma's remedial lessons having been scuppered earlier), ending up having a game of darts in a bar, with penalties.

Following the game's conclusion, the group encountered Misaka 10032 and Last Order, shortly before getting caught up in an attempt to kidnap the latter by individuals seeking to thwart Accelerator's Operation Handcuffs, a plan to eliminate the Dark Side of Academy City. After Touma defeated Maidono Hoshimi and the kidnapping was thwarted, the group learnt of Accelerator's endeavour and decided to face the mastermind behind the resistance, Director Neoka Norito.

Arriving in the evening as Anti-Skill was about to move in, the group witnessed an explosion at Neoka's home, set off by Neoka himself as part of a ploy to fabricate injuries and blame Anti-Skill to impede their investigation and buy time to destroy evidence. With Mikoto's ability, they scaled the building and got to the roof before Neoka could have himself injured and escape via air ambulance, forcing the director to try to eliminate them himself. While Neoka initially held the upper hand due to unexpected use of magic acquired from R&C Occultics, Touma and Index soon recognized what he was doing, and with Othinus's help, Touma was able to turn the tables and managed to defeat Neoka in a final physical clash before collapsing himself due to his accumulated injuries.

After the group left the scene and returned to street level, Touma was suddenly approached by Anna Sprengel, the one behind R&C Occultics, who swiftly moved in before the others' eyes and kissed him, exposing him to the contents of a black pill in her mouth.

Christmas Day Arc
Mikoto visited Touma in the hospital on Christmas Day, experiencing frustration and embarrassment from Shokuhou and the Sisters' antics, intending to keep an eye on his condition.

On learning that Touma was dying due to the ingested St. Germain, the two Level 5s teamed up to confront Anna Sprengel for the cure. Despite bringing their best equipment, they were unprepared for Anna's power, toyed with before being utterly defeated, unable to stop Anna from reaching the hospital,          where Touma came out to confront her. The girls were subsequently hospitalized due to their injuries.

Operation Handcuffs Arc
At the end of Christmas Day, Mikoto and Shokuhou met Kuroko in the hospital after she was hospitalized from injuries sustained during Operation Handcuffs.

Los Angeles Arc
Early in the morning on December 26th, Mikoto dealt with an attempt by Kuroko to get into her bed and found that Shokuhou had snuck out on turning to confront her about the apparent manipulation, with Shokuhou using the distraction to head for Touma's room, only to find to her dismay that Touma had already escaped from the hospital. Later in the day, the two Level 5s were having a minor scuffle (starting over the television), when Touma phoned Mikoto for help in unlocking Melzabeth Grocery's phone for information, with Kuroko's interruption ending up providing the information Touma needed.

Mikoto and Shokuhou were watching when the Sisters willing revealed themselves to the world to support Touma, who was fighting Citrinitas to save the trapped population of Los Angeles and to prevent Melzabeth Grocery from being framed for the magician's actions. Despite being alarmed at the suddenness of the reveal and faced with having to explain things to their family, friends and acquaintances, the two were proud of the girls for choosing for themselves to act to protect others and taking their first steps into a larger world.