So I paired Lily Dew up with her because Lily is usually very relaxed, quiet and provides much care to many bodies of water, especially the ocean. She tends to appear careless and/or share seemingly useless advice (sometimes using metaphors), but it surprises other ponies of how useful it is once figured out. Lily is just as caring with keeping the sea and other bodies of water pure, so Fluttershy wouldn't mind her company. :)
Three down…three more to go!