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Ekhem, sorry about that,
I hate fan fics, but it's not a fan fic, it's just a fact: Curly loves Quote, and Quote loves Curly. That's why he saved her, and she saved him, She after the battle with the Core, giving him her air tank, and he saves her in the waterway in the best ending. Also, they were sent on the separate mission together. But wait. Maybe they weren't send, maybe they have shosen to go there together? But, it doesn't tell you about their love. They could still be siblings, right? But, look at this: why did Quote give Curly Iron Bond with HEARTH on it? because she loves her. Also, it is said many times that they have emotions. So they could be in love. That's my theory, sorry if it sounds like a fan fic.