Alright, let me drop a form here.

Name: Accelerator
Age: 15-16
Gender: Male
Appearance: [url=http://img1.wikia.nocookie.net/__cb20120316131810/to-aru-majutsu-no-index/images/9/9f/Accelerator.png]Link[/url]
Canon, AU, or OC?: Canon
Universe of Origin: Toaru Majutsu no Index (A Certain Magical Index)
Personality: Though initially presented as a sadistic individual capable of mass murder, Accelerator has since "reformed"... In a way. Following the various incidents Accelerator has been involved in, he has developed a desire to protect those close to him and repent for his actions earlier in the series. Eventually, Accelerator comes to terms with his own faults and resolves to solve issues in his own way... Regardless of if they're 'clean' or not. 
Abilities/Weapons: Known as the strongest in Academy City, Accelerator's ability as an esper is that of "vector control"- by touching an object, Accelerator is able to alter the vectors that are applied to an object. He has also been shown to passively create a reflective boundary around himself that automatically reflects (or dissipates, in the case of magical attacks he has encountered at least once before). However, due to an injury he sustained to his frontal lobe while rescuing Last Order, Accelerator is forced to use an electrical choker that is connected to the Misaka Network; this choker allows Accelerator to function as he would normally, but only allows him a maximum of 30 minutes of his ability or 96 on 'normal' before having to be recharged. Accelerator is also forced to use a modified crutch while not using his powers; this crutch contains a small motor and weight distribution sensors, allowing for it to determine the center of gravity and thus support him a great deal more efficiently. Said crutch is collapsible and has a wavelength-blocking modifier installed by Accelerator himself. He also has shown the capability to produce angel-like wings from his back, which seemingly perform the calculations necessary for his ability and allow him to alter vectors without touching them; however, these wings only manifest during moments of extreme stress, thus necessitating the usage of his choker and crutch.
Backstory: There's waaay too much to state so I'm going to leave a [url=http://toarumajutsunoindex.wikia.com/wiki/Accelerator#Background]link[/url] to his wiki page here (Do note that the page is very spoileriffic, amd seeing as how I'm using the most recent appearance of Accelerator from NT10 as a reference...). Following his battle with Touma in Denmark, Accelerator returned to Academy City, at which point he was made aware that some scientists had managed to create a machine to access 'parallel worlds'... Or so they stated. Due to some circumstances out of his control, Accelerator was thus sent in as a representative for Academy City to the Multiverse, no thanks in part due to some meddling by the Board of Directors and Aleister Crowley.
Faction: UMMA