You cannot store an instance of an object (e.g. sprites) as with traditional OO languages (like have an array of them or something)... I believe there are third party plugins like 'instance bank' or something but I'm not sure if they do what you want. Usually the UID is stored, which can then be used to 'pick' the instance. But it's not the same thing.
Bottom line is no, you're not thinking the C2 way yet