>Add in some bullets to curve around its tail, while continuing to back away. Curve so that we have more room if the opportunity exists to do so without getting rammed.
>Keep up the attack, and try to angle our backing away toward the left edge of the hallway, so we can dodge rightward.
>Add in more attacks that curve densely from the sides; to serve as an anti-shotgunning barrier. They can spread out and be dodgeable some distance back.
>Give a brief reprieve on the curving danmaku. Do we tend to injure people that much with it?
>Let's try to get around it, while keeping up the defensive danmaku. Try not to antagonize it unless it takes aggressive action again.
>Let's loop around him and get to the hall with the stairs. From them, back away to the stairs.>Consider what vulnerable bits the cloud is covering, so we know what to target if it tries to attack again.