Sora's mother

Sora's mother is a background character in Kingdom Hearts.

Kingdom Hearts
When Sora leaves his house to check on his and his friends' raft, his mother calls for him to come down for dinner, only to notice his absence. She presumably disappears during Destiny Islands' destruction, and is presumably restored after Sora restores the worlds.

Between Kingdom Hearts Chain of Memories and Kingdom Hearts II
As a side effect of Naminé beginning to reconnect Sora's memories, everyone connected to him forgets all about him, including his mother. Eventually, after Naminé finishes, everyone's memories of him are restored.

Personality
Sora's mother has yet to make a full appearance. However, what is known of her is that she at least cares for Sora, as evidenced by her calling him for dinner and expressing concern when she realizes his disappearance.