Marie Bell Breguet

Marie is a mature young girl for her age who takes things very seriously, especially in her work.

Due to her genius intellect, she and others believe her to be the one smartest clockmaker in history, and would shoot down anyone who interrupts her. Despite this, she is able to work as a team player and works well with the rest of the Meister Guild, effectively fixing many problems faced.

She doesn't seem to care about her high status and would easily throw away her Meister title in order to fake her own death. Like Naoto, she takes pride in her work and would sometimes argue with those who criticize it.

(Source: Clockwork Planet Wiki)