Circular Homing Shot: The Aero Sentry Keeper MK-2 shoots several bullets which form a circle (">" then "O") formation in front of it before locking on and homing the player. The player can stay in the circle to easily avoid the attack.
Shotgun Burst Shot: The Aero Sentry Keeper MK-2 will quicky fire its cannon and release a random burst of bullets in front of it. This attack covers and counters the circular homing shot's gap. The Sentry will use this attack after it performed the circular homing shot 4 times.