you were born with an ability to turn into a thing called spirit form it gives you the ability to turn into a random spirit form but only one and you got one called berserker giving you a gas mask gloves super strength and speed and right now your fighting a spirit and your sister gets hurt cause she wants to help you and you already used your spirit form meaning your out of power but when you saw your sister get hurt your power activates and you transform meaning your going over your limit and your form looks different your taller and even more monstrous