This is great!
I think you can tell that the background and figure are different media but it looks intentional and they still look like they belong together. I don't think I would question it at all if I just saw the image with no accompanying comments.
Starting with watercolour and then finishing in digital is exactly what I'm also trying to achieve so I'll be following this thread closely! The only piece I think of as a success so far was my entry for the November Slowvember challenge. Here's the watercolour scan and then final piece next to each other:
not perfect but heading in the right direction I think. Watercolour is so fun to paint and although you can achieve similar effects with 100% digital, it's quite tedious and sucks away a lot of the joy and spontaneity.
I loved your Slowvember piece - was that all traditional or a mix?