I was wondering, would it be too hard to put your Retainers on the Asthetician?

Like, sometimes I get a cool-looking hairstyle that I would really like my Retainer to use and I would rather not bust him down to lvl0 only so I re-hire a Retainer with the hairstyle I want... But I wonder, would that be too hard to implement? Or even, how much of an improvement would that be?