Kiki’s Delivery Service is a great classic film and Kiki is an easy and wonderful character to cosplay. It’s no surprise that Hal wanted to recreate Miku. We’ve rounded up the best adult birthday party ideas for every kind of grown-up. Fiona. Finn basically wears the same clothing as Fiona, so it won’t be hard to use your closet to dress up like him. Shop deals in Costumes & Accessories.