Watch out Yaya Han. This girl might grow up to be one bad ass costume designer or cosplayer. Grim Hammer (a.k.a. BEST DAD IN THE WORLD) has posted pictures of his process in making one of the most awesome and cutest costumes I have ever seen. This “Voltron Girl” has made its rounds around the net but still no one has seen the other bad ass yet cute costumes he has made.