In the end, this is a technique that involves copying one's own traits to a representative object, and then remotely controlling it.That's right.Oh ho ho hoRepresentative object... well, let's see. Dolls, shikigami, spell wards, etc...Huh...Or like this.This is only my conjecture, but....
It is probably a specialized simple medium, in terms of shape and disposition, for the purpose of "elemental emission".If you apply a magical symbol, anything can be used as a representative.Because the two are always linked, the caster has to save her own magical force in the duration of the technique. More importantly, when the main part is in the library, she wouldn't be able to use most of her magic spells.Can't use magic...All the magical force returned to Lady Patchouli?Waiting roomSmoking prohibited in the waiting room all dayWell, basically, she divided her total magical force into two parts.Hmmmm...I see, so that's why she had to walk...Be like this...OohIn her case, she's using a mushroom she grew as the representative object.The caster and her representative object share the total magical force, so they will swap between being the main and sub.