Very timid, Frightened, and Concerned.
( From Mato Seihei no Slave / Chained soldier )

Bell is a young woman with long blue hair, a fringe covering her forehead, two small pigtails on both sides of her head that have beads on them, and orange eyes.

Bell is noted to be very timid, frightened, and concerned about various things such as failing to properly lead her unit, causing her to also be worried about being made fun of by the current Commander.