Neither! Arielle does not perceive hot and cold they way those who are alive do. Her body temperature is the same as the air around her. If it's cold outside then she's cold, if she's hot outside then she is hot, ect. She can control the temp of her body if she really wanted to though, its usually under special occasions— If the princess is cradling a baby in the snow for instance. However, I guess if she had to choose it would be the cold! Who wants to be all hot and sweety anyways hah