A boy who has short blonde hair with red eyes in this Cosplay Picture is Ion Fortuna from Trinity Blood Anime, Ion Fortuna is a Vampire Race, so even though he looks young but he's much older than you, you know what I mean. in Trinity Blood Anime his role as a messenger for Augusta Vradica.
Very reasonable if you think he look pretty in this Ion Fortuna Cosplay Picture, since the cosplayer on this Cosplay pictures are both girl, even though in anime Ion is a boy but Mon already made him 5x looks cute in this Ion Fortuna Cosplay picture. I'm a little jealous with what Radu Barvon do to Mon on this picture ^^'.