This question tormented me for a long time. At the end of KH2 we see how Roxas quietly "exits" from Sora to talk with Namine. But at the same time he does not even make himself known before and after. For example, when Axel tried to return Roxas trying to harm Sora, he could also "get out" of Sora and say "What's with him all right". Or in DDD, he could help Sora and his friends. He has knowledge about the Organization 13 and he could share it. But he did not do any of this, how do you think why and why?