 After Kingdom Hearts II : Final Mix was released , Nomura wanted to expand Roxas ' role in the series to explain the events between his birth and his disappearance from Organization XIII . For Kingdom Hearts 358 / 2 Days , the staff thought that Roxas ' role as a member of the group would be a suitable theme for the plot . Roxas was chosen as the game 's protagonist as the staff thought that having a main character besides Sora would help to introduce gamers to the series ' first Nintendo DS title . Co @-@ director <unk> <unk> explained that Roxas ' height was originally lower and as the game continued development , the staff decided to increase it . Nomura desired to portray Roxas ' activities different from Sora 's . In Sora 's games , he is on a journey around the worlds , while Roxas always returns to Organization XIII after each mission . The staff constructed Roxas ' interactions with the Disney characters to be different from Sora 's as the Organization was meant to be secret in the game 's story . Nomura told the writers that he wanted Roxas to learn something from each of his missions or just to have something to think about . Nomura later clarified that Roxas ' personality was different from the one portrayed in Kingdom Hearts II as he does not actively attempt to come into contact with other characters . With Kingdom Hearts 358 / 2 Days , Nomura wanted to reveal why Roxas left Organization XIII . Although Nomura found it to be a sad story it , he considered Zack Fair 's ending in Crisis Core : Final Fantasy VII more tragic . His last words in the game were also Nomura 's most significant ones from the title as he wanted it to connect to Kingdom Hearts II 's first scene , which is actually the same scene . Uchiyama expressed sadness when the game ended development as he would not play the character for a long time . 
