Figma Little Armory - Maria Teruyasu Re-issue

From TOMYTEC's 'LittleArmory' 1/12th scale weapon model series comes a figma of one of the series characters - a student of Reiyou High School's sniping classes, Maria Teruyazu!

Who is the Little Armory's Maria Teruyazu? 
Maria Teruyazu is one of the characters seen on the Little Armory packaging, illustrated by Haruaki Fuyuno. She is a student that specializes in sniping at Reiyou Metropolitan High School, and works primarily with anti-materiel rifles.