Sora is one of the deepest relationships Naminé has with anyone other than Roxas. In Kingdom Hearts: Chain of Memories, Sora is constantly trying to find her and save her. But before the Castle Oblivion, Sora did not know of Naminé or her existence.
The game of Kingdom Hearts: Chain of Memories starts out with Sora journeying once more to find Riku and the King with Donald and Goofy, but instead finds a mysterious castle named, Castle Oblivion. A mysterious man (Marluxia) in the beginning told Sora that he would begin to lose something precious, but he would gain something else in return. Sora's first thought that comes to mind is Riku, so he enters the castle without hesitation. As the journeyed farther within the castle they find out they are losing bits memories, but Sora gained another one. It was of a blonde girl that hanged out with himself, Riku, and Kairi.
As Sora journeys through the castle, he remembers more. Like how she always drew when they were on the beach and how he and Riku fought over who gets his picture drawn next. After Halloween Town, another Organization member approaches him. Her name is Larxene, number XII. Before the battle, she strikes at Sora and a star-shaped charm falls out, and Sora soon remembers who gave it to him.
Even if the memories were fake, he had strong feelings for Naminé, seeing that she replaced Kairi with herself. In the end Sora saves Naminé from the grasp of the Organization members within the castle even knowing what she had done to him. Sora cared about Naminé and made a promise with each other. She watches over him as she soon fixes up the memories he had forgotten.
It seems even though they have become good friends, Naminé knew he would soon forget about her even though they made a promise to be friends in the real world. In Kingdom Hearts II, they meet once again, but Naminé doesn't seem interested or even notices Sora being there and approaches Roxas who was within him. Sora and Naminé became good friends, but it unlikely they will see each other once more now that she has fused back with Kairi.
