Silhouette is the first gatekeeper battled, and the battle occurs in expansion 0. She is intrigued that Player can see her since her form is gas. Her domain is titled Silhouette's Domain. She is of N, a colorless gas, therefore humans cannot see her. Furthermore, since she has a gas form, she is unharmed by non-element attacks. Her special move is retaliate and this move is sharable with Player.