>>1632108Do you have a pixiv account? That might have something to do with it?
Otherwise, you should find most of the works involving that girl by just CTRL+F-ing "ヴァルキュリア" on his works list (there should be five pages of works, but not all of them feature that girl).
That said... these two seem to be the main ones anyway:
http://www.pixiv.net/member_illust.php?mode=medium&illust_id=36778650http://www.pixiv.net/member_illust.php?mode=medium&illust_id=39441558(The first one has her nipples censored with her own hair, the second doesn't.)