Windows 10 Madobe being an anime Cortana, I can see it happening but I wouldn't like it very much.
Don't worry, it's seems less possible for Cortona to be W10 mascot.
Since Japanese Microsoft anime artist completely forget about her.
According to that link from your post.
It's highly possible to be W10 Official mascot.
I've done a bit research a about her.
Since they said it's Windows 10 DSP (DSP版Windows 10)
Even Madobe Official mascots are all Windows DSP Edition iso.