The «Bullet Line» (弾道予測線(バレット・ライン), Baretto Rain?, lit. Trajectory Prediction Line) is a defensive system assist in Gun Gale Online that allows the player's targets to see the trajectory of the bullets that are being aimed at them. According to Sinon, this is the game's nonsense way of making things interesting, as it allows a player with high agility (AGI) and enough courage to evade more than 50% of an assault rifle's continuously fired bullets from a 50 meter range.