I have had my hair in a very short crop on and off for years.
I always take in a picture of Jean Seberg (and explain that I realise I have fuck all chance of ever looking that incredible!)
The hairdresser always says, 'ooh that is really short' and then cuts it too long, so I ask them to take some more off.
9 times out of 10 the hairdresser will ask if they can then add half a ton of waxy goop to my hair and try to bouff the fuck out of it with a hairdryer. Sometimes I let them carry on because it seems to make them happy (bouffing must be in their DNA) - if they do this I run straight to the toilet and stick my head under a tap. Most of the time I ask for a teeny bit of wax, and then sort it out myself.
The lady who cuts my hair now, uses scissors followed by feathering scissors to chop into it (I have very thick hair)
I prefer it when my hair is a strong colour - has been dark brown, pillar box red and is now bleached to buggery platinum blonde.
This is a lovely Jean Seberg
I think your dd probably needs a stronger colour, and for her hair to be thinned out a bit, it probably would do better for not too much product and not too much bouffing.