They are very different but support each other a lot. They have a lot of fun together, but Allison goes also with Tom when he fights and kills vampires. At first Allison protects the vampires, but then she gets colder and doesn't mind to kill them. Tom does not like this development. Therefore, he breakes up with her and tells her that she shall go back to her parents and live a normal life. Tom continues to have feelings for Allison after she returns home and even implies that he plans to reunite with her someday. He tells Alex that Allison is "the one".