I adored this game ! I played through all the routes because the characters were so interesting and diverse (and I was curious about the secret ending, spoiler : I loved it, really fun :D). The design and art of the whole game is so beautiful and made it even more magical. The music and its variation depending on the route is such a sweet detail too !
In the end, not sure if I can pick a favorite because Klaus owned my heart (he is so sweet) but I would give Rosie the world if he asked.
Thank you for this great game :)