Looks familiar. Possibly a younger Emma Watson?

Anyway, as per the other looking-for thread, SauceNao (and its plugin) is your friend. The first pic is probably out on XHentai or similar. The others... if they're not already on GC (in the 3D CGI section), then you're on your own, there's no way I'm sending that data out to the internet. SN and IQDB probably won't fetch you any trouble (but might not fetch any results either) if you submit them yourself, but putting them anywhere near TinEye or Google feels like a bad idea.