Sunazara Chimitsu

Sunazara Chimitsu (砂皿 緻密) is a mercenary famed for his sniping skills, and is known by both Anti-Skill and the Dark Side of Academy City. His career virtually ends during the events of October 9 after he is grievously injured during a battle against ITEM as an operative of SCHOOL.

Appearance
He appears as an adult man with strong facial features. He wears his black hair short.

Toaru Kagaku no Railgun: Uiharu SS
On August 1 he is hired by the higher-ups and answers to Kouji Masakage of Anti-Skill to destroy an overpass leading to School District 3 as a vehicle carrying 1500 kilograms of hydrazine has been remotely hijacked by a terrorist and was heading there. He successfuly destroys the overpass fulfilling his mission.

Battle Royale Arc
He is hired by SCHOOL as a replacement for the sniper that was killed by ITEM three days prior to the start of the arc for their plans on assassinating Oyafune Monaka. According to Tsuchimikado Motoharu he was employed just from the ¥700,000 referral fee, and thus he's one nice bargain item for SCHOOL especially at such short notice.

He then meets up with Management to aid with the operation, preparing a MSR-001 as the weapon as well as the plans for the assassination. During Oyafune Monaka's address to the students regarding suffrage for the children of Academy City, he attempts to take a hit on Oyafune Monaka. He first disables the Wind Defense devices protecting her from the sniping, but doing so alerted the presence of Tsuchimikado Motoharu and Accelerator. Before he can shoot her, his efforts are foiled by them creating a commotion, an explosion, forcing Monaka and her bodyguards to leave in haste. Realizing that it was too late and that shooting Monaka would be close to impossible, Chimitsu decides to retreat. Before doing so however he decides to investigate the explosion. Here, he sees that the explosion came from the Wind Defense and later sees Accelerator emerging into the scene, staring directly at Chimitsu. As he disassembles his rifle and begins packing up, he promises to remember Accelerator's face. Despite his failure, his attempt allowed SCHOOL to easily infiltrate the Elementary Particle Engineering Laboratory due to the change of security in response to the assassination attempt in order to steal the Tweezers.

Later, after Frenda Seivelun betrayed ITEM's location to SCHOOL, he and the Girl in dress accompany Kakine Teitoku to attack the Private Salon in School District 3. He is in the lobby when he begins shooting at Kinuhata Saiai. Although the force of his bullets using the MSR-001 is able to knock her back her ability the Offense Armor protects her from being killed by them. After anlyzing the bullets, Saiai is able to determine Chimitsu's hiding spot. From there, Saiai uses Handheld anti-tank missile warheads to attack his approximate location. He is later presumed dead by even Teitoku.

DRAGON Arc
He survives the blast, though grievously wounded and was kept alive by Thomas Platinaburg to use as a bargaining chip to hire Stephanie Gorgeouspalace, although his body was tampered with in an attempt to assure Stephanie's cooperation. Later it was revealed that he was the mentor figure for Stephanie Gorgeouspalace, who would seek to avenge him in light novel volume 19. He also, somewhat ironically, told Stephanie that he would never be killed in an explosion no matter what.

Agitate Halation Arc
Despite still being in a coma, according to Stephanie Gorgeouspalace, Chimitsu is hired by Academy City to lend his sniping experience via electronic equipment.