I don't think I've ever used the term 'whimsical' before. I feel old.
Anyway, my point is that it's different and works. Sharp and clear lighting, nice separation of the subject. I'm sure someone will come in and find a dozen things that could be improved with it.
Nice shot. I like the composition and I don't have a problem with the crop. I'm sure it was what you wanted/intended. I like the blue, but I think it'd be nicer (my opinion here) if you kept the blue, but warmed up the skin-tone to a more natural hue.