Alice first sees Bella as her friend and as a vampire. She had a vision of Edward and tells him that he is falling in love with Bella. She knows that he loves Bella before he does. Alice takes care of Bella in Phoneix before Bella runs away to James.They become extremely close friends. She plays "Bella Barbie" which includes dressing her up, doing her hair, and makeup.
Alice is basically Bella's best friend. She throws Bella a great party for her birthday, like all best friends should. After the Cullens leave, Alice is the first to come back after having a vision of Bella committing suicide. Alice helps Bella save Edward from giving himself up to the Volturi. She also committs Grand Theft Auto to get to Volterra. This is where the infamous yellow Porsche 911 Turbo comes in. Aro takes a liking in Alice for her power, once Edward is saved.
Alice constantly takes Bella shopping. Alice sees the problem in Seattle. She also sees the confrontation of the army and the Cullens before the werewolves (shape-shifters) get involved. Alice also throws herself, Edward, and Bella a fantastic graduation party. Alice also helps Bella figure out what the army is after. She babysits Bella and eventually gets her Porsche. Alice sees Bella and Edward getting engaged and is allowed to plan the wedding. She also designs the dress and becomes maid of honor. Alice helps Bella to try and get over Jake.
Information from: http://en.wikipedia.org/wiki/Alice_Cullen_(Twilight_character)
