Are you looking for a PB who has enough pictures for a set of icons or a picture to maybe link through your bio, just something for reference? It's true there aren't many Asian girls younger than 10-12 in icon journals. I would recommend MaiHagiwara because she's adorable and I know she has a set of icons (yourfacehere, which is f-locked), but she's about 12 or 13 now. Google has plenty of pictures of her from earlier in her career (here's one). Alternatively, you can usually find some cute kids on child modeling sites, though they don't offer many pictures.