At the same time, it's shown that some degree of acclimatization is possible with familiarity with Imp/Imp's power. When she's first introduced as a cape, whenever she uses her power around the team, they totally loose track of anything that she had been involved in, spend a moment going 'something's wrong, what was I doing?' and then rationalize in a way that removes any hint of 'Imp was involved.' Later on, the same things happens, but instead the reaction is, 'Something's wrong, what was I doing- IMP! STOP THAT!' Because they've learned that Imp can do that, their rationalization for 'forgetting Imp' starts to include 'Imp used her power.'