I agree with this question. Also, will the ghost be able to follow the character around, interact with the physical world? Will others be able to detect the ghost? At the basic level, this would be a good excuse for the character to acquire skills, talents, and other abilities that are outside his normal concept and design. Imagine how good a security system she would be - someone entered the designed area and (on the appropriate roll) she returned and let's him know all the details the the GM thinks that the character should get. The character does not need to have security systems, clairistence, or anything else that would lend itself to this ability - they are all a result of the ghost spying on the area and telling him what is going on.