Serah fights using Mog as a weapon. As such, any ability that transforms Mog back into his normal form will render Serah unable to use her Ⓐ attacks until he is reverted back into a weapon.
As compensation, all Ⓐ attacks come in two forms depending on whether or not Mog is transformed into a sword or a bow, of which Serah can switch between instantaneously. Sword attacks tend to be slow but powerful, and may grant Serah temporary heavy armor, while bow attacks are generally quick and long ranged. Bow attacks diminish in strength the further they travel, while sword attacks are their strongest at the base of the sword.
|— Caius Ballad|