>Who are this mana demons?
>It's an unspoken rule that tsunderes must always have the plainest body.
Not really there's a bunch of big tittied Tsunderes.
The only semon demon there is Sakura and she is also the best girl.
>The bigger question is why Sakura's body is so curvy and Rin's isn't.
Because worms aside, Sakura was actually given proper food. And Kotomine starved Rin as an experiment for his own musing.
>Sakura was actually given proper food.
This Shirou made her healthy.