User blog comment:Imouto-tan/Nayuta Mitsuari/@comment-4867780-20170406214402/@comment-26362471-20170406233706

Nayuta is skilled enough to cast spells without incantations, furthermore, she can use her "Doublecast" spell to use any spell that she casts twice instantaneously without expending extra Mana to do so. She uses spells and techniques that she saw them do in order to get the most out the brief time that she has with the opponent's power. Once the app deactivates she forgets how to use the magic, but can use the spell without the proficiency of when she's empowered by the app.

Nayuta tests magic apps before they go on the market allowing her to have so many magic apps at a time. She also illegally obtained the black market magic apps either during missions or she downloaded them before they became illegal in the first place. Most of Nayuta's magic apps are test apps so they're not even on the market yet.

Sherria's ability is just controlling the boundary of Fantasy and Reality. The app is based on normal Illusion Magic.

There are various magic apps that grant invisibility under certain conditions, but Nayuta prefers Moonlight Shadow as it's one that she made.

Well illegal are illegal so they are impossible to obtain so the feds don't have to worry about them as Nayuta is the only one with a copy of said apps.