Triela Hilshire is a prominent character in the anime series "Gunslinger Girl." She is one of the cyborg assassins, known for her mature demeanor and strong sense of responsibility. Triela is paired with her handler, Hilshire, and serves as the big sister figure among the girls. Her character is deeply layered, as she navigates her role as an assassin while grappling with the remnants of her past life before becoming a cyborg. Her emotional depth and unwavering loyalty make her a compelling character in the series.