She is both what you would expect from a succubus and also her complete opposite. She acts as onee-san, as a mother and as a misunderstood virgin, and can sometimes switch between these in the middle of a conversation or be none of the three. Succubi do not have feelings in a similar way to humans. They need to feed on the human race to get the fuel they need to feel their own feelings. However, Shaula seems to be a very emotional help person, which shows that, at least, she is well fed.