Sha Danshan

Sha Danshan is a student of Tokiwadai Middle School who appears in Toaru Kagaku no Railgun. She was the leader of the largest clique of Tokiwadai Middle School, one year prior to the main story.

Etymology
Her name is Chinese in origin. Her first name Dànshàn means "frail fan", while her last name Shā means "sand".

Appearance
Sha has red eyes and long black hair, with a white lace headband tucked over several of her fringes. She wears a red flower brooch on the left side of her hair and a pair of glasses with rounded rectangular frames, the left frame resembling a stylized teary-eyed expression. She wears the Tokiwadai Middle School uniform, sporting dark-colored stockings. She holds a panda doll. She doesn't wears a bra despite having big breasts.

Personality
Sha carries around a panda doll, which Hasekura remarked she couldn't talk without. She uses a lot of four character idioms in her speech.

Background
At the start of Misaka Mikoto and Shokuhou Misaki's first year at Tokiwadai Middle School, Sha was in her second year and leader of one of Tokiwadai's 'big three' cliques. Said to be the closest to the title of "Majesty" at the time, her clique was the largest.

Sha and her clique believed that the gifted had a duty to do volunteer work (such as buying and greening deserts) and its members were dedicated to service, earning them popularity and power. It was suggested that their efforts might have been to thank for Tokiwadai being considered one of the top five schools. It was also suggested that the secret to Sha's popularity might have been the protective desire inspired by her weakness and frailty, having a weak constitution and being nicknamed the Infirmary Empress (保健室の女帝).

First Year Arc
Sha first encountered Mikoto in early May, when the Level 5 was looking to return her roommate's phone accessory. Initially talking behind her panda doll, Sha remarked on the accessory. As Mikoto introduced herself to Sha, Mikagami Nagisa and Hasekura Reiri appeared from separate directions, with Mikoto between the three main clique leaders. After a brief exchange between the rivals, Hasekura dragged Mikoto off for a contest.

At another point in the first half of the year, Sha encountered Judgment trainee and future Tokiwadai student Shirai Kuroko. After Sha's actions led to the two getting drenched by a fountain, she treated them to new clothes. She also told Kuroko some information about Tokiwadai from her point of view.

As conflict was brewing between the Mikagami and Hasekura cliques due to the alleged attack on Kazan'in Tsukasa by Enjou Kasumi, Sha talked with Lily in the infirmary about the incident and inconsistences in the witness testimonies. With Sha raising the possibility that they were all telling the truth, Lily suspected Shokuhou Misaki's involvement and despite Sha thinking otherwise, decided that she needed to question her, given her previous institution being broken up and her unknown current affiliations.

Sometime later, Sha visited a lab and used her ability to reproduce the image of a dinosaur from a fossil for the researchers. On leaving the lab, she met with Lily, Lin Lihua and Ouyang Qian, bandaged after trying to take Shokuhou for questioning and being knocked out by Hokaze Junko. Although Sha assuaged their fears about potentially being controlled, she was annoyed at them doing this without telling her anything.

A week after Hasekura had organized a truce with Mikagami in light of an external culprit, and not long after she had started rumors about Shokuhou's cooperation, Sha encountered Hasekura and Kessai outside Tokiwadai, having been making and giving out pottery plates as volunteer work. As Sha was expressing annoyance at being left out, the group came under remote attack, with Hasekura blocking the projectiles, having Kessai make a smokescreen and telling Sha not to use her fossils yet. After the unknown attackers retreated, Sha analyzed the residual thoughts on one of the projectiles, which included Hasekura being the target and the phrase "Attachement Dark Matter". She noted that it lacked the amount of residual thoughts normally gathered by matter affected by an esper power, suggesting it was produced through other means.

When the Hasekura clique raided the headquarters of Montgolfier, the culprit behind the attacks that instigated and aggravated the clique conflict, Sha had her clique reinforce them in the resulting battle with Montgolfier's operatives and their prototype weapons, along with Mikagami's clique.

Abilities
Her esper ability is remain-based Psychometry that can physically print out the result, but it burns down the original material afterwards. She can temporarily reproduce the image and sound of a dinosaur with a piece of fossil, making her ability very useful in. She apparently carries fossils of strong creatures (such as the B-Rex and Omegalodon) for self-defense purposes. She is capable of a more conventional reading of residual thoughts on an object without burning it down.

Her level is currently unknown, but as a student of Tokiwadai Middle School, it can be presumed to be at Level 3 or 4.