I meant Nerissa. XD Rose's alternative hair color is more likely black or the black/red version of that hair. XD The dark red dress is something that Stella might disapprove of because of the low neckline and Jessica Rabbit style. XD Nerissa sucks most at Cute and Smart contests though, and the dress reflects that. XD 

It's one thing to have a floral bandana, which is fairly common, and another to have a Tumblr-style/Johnny Weir-esque flower crown, which is something Emil might find silly. :P Hey, he looks so sexy in his Mountain Kalos "captain" look! XD

Stella's rationale for making Emil and Nerissa dress up as Boreas and Khione had to do with Emil acting like an old man at times, and Nerissa being an impulsive teen who goes all out and sometimes can't follow simple instructions...hence became a younger deity. XD