Famine is rather an odd personality, he constantly wants to give others what they wish for, and this can be misleading. So in general he is almost a conman and as such, he will draw others in with his personality. He seems to be a bit cheerful and charismatic among others, he uses his own appearance to often pretend he is an ill man or such. Leading others into a trap and then he often will ask them what is they truly desire. He claims to be a god in human form and because of his devil fruit power. This is why he can do such things, but he seems to more humble.