Matsuoka Raita

Matsuoka Raita (松陸頼太) is a character who appears in Toaru Kagaku no Railgun: Cold Game.

Background
In the past, in what would later be called the Fireball Case (火の玉事件), surveillance drones kept bursting into flames or crashing. The electronics company involved, not wanting to conduct a recall which would cost them billions, falsely accused Matsuoka Raita of being the culprit responsible for the incidents. It was eventually discovered that they had fabricated the charges and they ended up having a rough time with the Civil Rehabilitation Law. However this wasn't enough to heal the psychological wounds dealt to Raita, who subsequently posted dangerous 'how to' videos online to teach people how to trigger fires and explosions without using an esper power, leading to various people committing crimes based on his instructions.

He was later arrested but due to Tsujinaka Kyouka, he wasn't indicted. He then got plastic surgery and slipped through Judgment and Anti-Skill's surveillance. Having trouble getting by without an ID, he was bought over by Tsujinaka.

Abilities
His ability is Ion Trade (電解取引 (イオントレード) ), which allows him to freely manipulate microscopic ion exchange. He can use it to heat up batteries to start fires. He can also apparently use it to cause myocardial infarctions or instant aging just by touching the human body.