[she looks extremely puzzled] but, you look exactly like him. I mean, the clothes were different, but.... [she falls into silence pondering this strange phenomena]

do you have a twin?

[as and after thought she adds] Sora is the Keyblade wielder. he showed up in Traverse Town and you, or, some one who looked and sounded just like you, helped him out. A gummi ship is a ship used for traveling to different worlds. you fly on it. and the materials it's made out of are called Gummi's. hence; Gummi ship. [she smiles satisfied]