Given the third quartile of the story, you sort of need bland.
But bland also doesn’t keep the reader turning pages
So let me rephrase my question of your target reader into: what is your competition doing?
Also considering Kim is pretty bland. In the main story it's 60 pages before she even kicks a soccer ball. Readers on some other site have been asking if she can do anything. I haven't warned them she'll be lopping off heads in a scant 200 pages