Sunazara Chimitsu

Sunazara Chimitsu (砂皿 緻密) is a member of SCHOOL and a professional sniper.

Battle Royale Arc
He is a replacement for a previous hired sniper who got killed by ITEM a week prior to the start of Volume 15.

For the current assignment SCHOOL has prepared a MSR-001 Magnetic Sniping Rifle, a sniper rifle made in Academy City that uses electromagnets to fire steel bullets at the speed of sound; compared to normal rifles it's more precise and does not make any sound at all when shot.

He attempts to take a hit on Oyafune Monaka, but the hit is foiled by Accelerator's and Tsuchimikado's efforts, who create a large commotion that tightened the security around his target. They also properly pinpoint his sniping location, which forces him to leave or be captured

According to Tsuchimikado he can be employed just from the ¥700,000 referral fee, and thus he's one nice bargain item.

When SCHOOL attacked ITEM's hideout, Sunazara took it upon himself to snipe out and kill Kinuhata Saiai while Kakine fought with Mugino. However, Saiai was in possession of an anti tank warhead and her ability allowed her to block his sniper rifle completely and properly counter attack with the missile war heads.

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.

Trivia
Apparently, a fight between Sunazara Chimitsu and Misaka Mikoto was recommended by the editor of (either Dengeki Daioh or the publisher that does Railgun?) but was not included in Railgun S. This was one of a few other possible suggestions that the editor made for Railgun S. Apparently Sunazura is one of the Editor's or Kamachi's more beloved characters. (will find the reference soon).