No, they won't ask for the skill again since new learned skills of a unit are BR bound (ie Baulson learns Remedies at BR18). On the PC version you can always select "Yes, learn the skill" and deactivate the skill(and their corresponding arts) afterwards. I'd advise the following PC: Say always yes to them, deactivate skills you don't want them to use. In both versions units should always learn: Herbs(reviving, heal) Potions(it's better to have units use a potion for statbuffs than just letting them do nothing during turns in which you have to heal/heal others/revive)