I'll divide the characters I'd like to see into third and first party lists.
Third party characters;
6. Alisa Amiella (God Eater)
5. Amaterasu (Okami)
4. Klonoa (Klonoa)
3. Viewtiful Joe (Viewtiful Joe)
2. Ryza (Atelier Ryza)
1. Milla Maxwell (Tales of Xillia)
First party choices;
6...