...first off, tubes are an item. All this suggests is that Adelheid just carries a bunch of items on her person. They're just not temporary for her. Second, "tubes" don't fit the job at all. They're an item, not a job ability/spell. Scholar is a master of using the grimoire, bouncing between white and black magic and showing mastery of each, albeit one at a time. And third... I don't recall anyone but the Campaign version of Adelheid using it, which just suggests she bought a ton of them before the battle started and uses them as it suits her. Even if the Trust version used it, you could just consider it a TP move like it is for masked goblins.