Hiro Hamada<<< I really don't have a least favorite song from BH6, but if I had to choose, I would say "Microbots" from the movies score just because I really don't feel a big connection with the scene and the music. I kinda wish that they could've picked a song with a little more energy.
Aunt Cass and her doughnut.<<< my favorite female character of BH6 would have to be Aunt Cass. I like her because she's a perfect motherly figure to Hiro and Tadashi even though she's their aunt. She's a very lovable character in my opinion for her humor and I feel as if she should get a little more attention.
"Destroy," 4/4<<< my favorite song in Big Hero 6 would be "Silent Sparrow" for the fact that the music is so strong and dramatic. It really reflects the intensity of Hiro's emotions and thoughts, also the situation. I have a thing for that kind of music. And movie scores.