Beatrice is an unemotional and apathetic girl, posing as a sharp contrast to her handler Bernardo. She has a unique Cyborg ability, allowing her to smell explosives in an area or on an indivdual. She forms a friendship with Claes, who teaches her botany and gardening.
Beatrice is killed during the Venice Operation against Giacomo Dante in Volume 11 by a shot to the chest from a Denel NTW-20 anti-materiel rifle, while throwing a 500kg missile warhead out of the Belltower of St. Marks. Her last thoughts were about her unique duty to do what normal people can't do because she does not fear death, and the many people who wish for Triela to live.