You're assuming that Priscilla is a pseudonym. In fact, we don't know. That's a difference. Priscilla can also be a middle name or a person unknown to us. Maybe we have seen it before, but it would still be unknown to us because we cannot assign the name.
We don't know whether it's a pimp, madam, lawyer, relative, etc.
The only thing we know is that Stephen Burke calls this Priscilla and he has to explain to her why he can't give Maya the scholarship. Please keep in mind that Maya's scholarship application was already approved. So it was just a formality so that Maya could get the degree. Stephen Burke had to decline. Ergo, this Priscilla is above Stephen Burke in the hierarchy, because otherwise he wouldn't have to explain it.