Roxas ' first appearances was cameos in " Another Side , Another Story " , a bonus trailer found in Kingdom Hearts , and in the ending of Kingdom Hearts : Chain of Memories . In Kingdom Hearts II , Roxas is introduced as a boy living in a digital replica of a city called Twilight Town . Unaware of the virtual nature of the city , Roxas begin to dream about the adventures of Sora , the series ' protagonist . He later encounter Axel , a member of Organization XIII who was given orders to rescue him , and Naminé , a Nobody who tell him he is Sora 's other half . Shortly after meeting , Ansem the Wise , the creator of the virtual world , Roxas learn the nature of Twilight Town as well as that Ansem erased his memory , and implanted false ones to make Roxas unaware of his past and then make him merge with Sora . Ansem lead Roxas to an old mansion where once reaching an asleep Sora , Roxas rejoin with him , allowing Sora to wake up . Sora later learn that Roxas is his Nobody , created during the events of the first game after Sora briefly turned into a Heartless . Xemnas brought Roxas to Organization XIII as he could wield the Keyblade , a weapon which would help them to capture hearts . Roxas later betrayed the Organization and encountered one of Sora 's friends , Riku , who captured him to help Sora wake up . Roxas make two appearances near the end of the game . The first is in a mental battle with Sora depicted as a cut @-@ scene , and the second is with Naminé , who have merged with her other self , Kairi . In the re @-@ released version of the title , Kingdom Hearts II Final Mix , Roxas ' fight against Sora was expanded , making him a boss character . The battle was meant to be interactive in Kingdom Hearts II , but time constraints imposed from creating fights for the other Organization XIII members prevented inclusion . With the opportunity to include the fight , Nomura 's team worked hard to make it entertaining for players . Additional scenes regarding Roxas ' past was added to the game to add to the mystery around him .