"Yes." Did you really even need to ask that, Sora? Seriously. They'll call you whatever you want to be called, and never seriously question it unless you, personally, seem uncomfortable with the decision. Which was had had happened a minute ago, here. Then, out of a vague sense of curiosity, they ask, "What do you call me? In your head." Since they have no name, and even nameless weapons require things to refer to themselves in their head, Sora probably does, too.