"You did say that. Though at the time you didn't say the names. It made sense then, and it makes sense now." It's not like at this point they have any and don't fucking want any, so it's not really a surprise that neither would Sora. They do understand, and now kind of regret the not-quite-joke, not-quite-serious-suggestion, given the look on Sora's face. "It was just a thought, kid. You don't need to have a third name any more than you need to explain anything to me. But whatever name you have, you're still you."