And despite their differences, they are very good friends.

Fun fact: The uniform of Nobuko's class has brown shirts and yellow skirt/pants, with yellow being the color all the students share in their uniforms despite their grade, but Nobuko decided to wear a black skirt (one she barely used that was almost identical to the school ones) because for her, and I quote, "looking like a chocolate vanilla ice cream wasn't an option". Also, if the accident where she lost her eye never happened, she would be wearing the same uniform as Mana (but she would have chosen to wear a black skirt then too).