Specifically, would it be possible to turn Rice Krispies into rice suitable for serving with chicken teriyaki?  One of the main characters of the webcomic Leftover Soup is an expert cook. To establish the character's skills, the author has him prepare a restaurant-quality meal from the contents of an extremely understocked kitchen, with only one hand. One of the feats involved in preparing this meal is reconstituting Rice Krispies into rice, to go with chicken teriyaki.  I have no idea how realistic this scene is. Is this actually something you can do with Rice Krispies? If this is possible, how would you do it, and would the results be any good? The author's notes say it'll be explained in the strip how this works, but by the time I stopped reading, it hadn't been explained yet. 
No, you can't revert a Rice Krispies kernel back into something that resembles a grain of steamed rice. According to the company itself on their website and in this video, individual grains of Rice Krispies are in fact individual grains of rice, but there is no way to make them fluffy again.    If I were to use the product in a savory application, I agree with @ElmerCat that the best way to do it would be to treat it as a crunchy element, like crunchy chow mein noodles.  In comments, you linked to the answer in the comic strip that made you wonder, so that answer is here     That particular comic is oddly apropos for Seasoned Advice :-) 