[She pictures Erza's, Mira's and Zeref's reactions as he offers for Katsuki to clean Fairy Haven.] That won't be necessary. Or just a little help with repairing some targets and dummies on the practice grounds, if he must. [For now, she'd suggest a chore that takes place out of Fayren.]

Even if the Guardian in question turns out to have even less experience that you, and already needs your guidance in other matters as your student?