Concerning 8: There has been a follow up to that one by the artist: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=44516661
Also those two: http://www.pixiv.net/member_illust.php?mode=manga&illust_id=47993325 http://www.pixiv.net/member_illust.php?mode=manga&illust_id=50574259
@yantock: character is Mineva Lao Zabi (Gundam Series). Don't know about the artist though.