Ray Storm (レイストーム Rei Sutōmu), also known as the Storm of Optical Vortex (光渦の嵐 Hikariuzu no Arashi), is the Inherent Skill of caster::Otto. It is the generic name for her area-of-effect attack and force field abilities. The energy using of Ray Storm is similar to the Midchildan magic system. Although Ray Storm is of area-of-effect type, it is sometimes used apparently as shooting spells, and guiding of the ray is possible.