Biar Colossus acts as the personal assistant to Kray Foresight, Executive Governor of the Autonomous Republic of Promepolis and President of the Foresight Foundation. She executes his commands with unwavering obedience and precision, seldom speaking unless required and displaying minimal emotion except when personally threatened. Her appearance is marked by purple hair pulled into a bun with several large strands sweeping upward in a bird-like shape, secured by a black pin. A prominent side bang covers the right side of her face. She wears red lipstick and blue eyeshadow, distinctive among her peers. Her outfit is a two-piece uniform comprising a black and white coat with cleavage and a knee-length black skirt, paired with black high-heels. She accessorizes with a white bracelet on her right arm and a black choker around her neck. In the narrative, Biar first appears alongside Kray at Foresight's tower, joining him and Galo Thymos in an elevator ride to Heris Ardebit's laboratory. She remains detached during surrounding events, including a magma demonstration and Galo's removal by guards. Later, she supports Kray in directing workers and analyzes the transformation of Deus X Machina into Lio de Galon, noting the purity of its flames. Her final appearance places her aboard a ship struck by teal flames from Galo de Lion; as these flames do not harm non-Burnish, she survives the blast. Biar's relationships are strictly professional. She shows absolute loyalty to Kray, following his orders without hesitation and retaining composure during his outbursts. Her exchanges with Heris Ardebit are formal and task-oriented, indicating a collegial dynamic within the Foundation. She has little direct interaction with Galo Thymos, maintaining a neutral or subtly negative stance, as she does not react to his mistreatment and aids Kray in matters involving him. Further details reveal that Biar co-pilots the Parnassus ship. Her name, like Kray's, draws from Greek mythology; Biar comes from Bia, goddess of force, and Colossus refers to Greek statues. They are represented as twin giants who took part in the punishment of Prometheus. Early concept art depicted her with long or blonde hair and a tan, though her final design incorporates stylistic elements reminiscent of Pandy from Dead Leaves, particularly in her hairstyle and lipstick.