Two of those questions, at least, are answered in the game, or at least have enough information presented in the game.
Troy's nickname "Child of the Sea God" was given for his major destruction of Razril and Gaien ships at a very young age (mid-teens, if my math works right) in command of a Kooluk fleet. He became like the Teo McDohl of Kooluk - everyone knew him and what he was capable of, and he became feared by the enemies because of how well he could do it.
As for the prince of Obel living, I shall pose another question - did you get all 108 stars? If so, that question should be answered if you watch the entire ending... ... Of course you have all 108 stars. You have Snowe. Duh to me. It's not so much theory as fact - it's not established directly in the game, like so many of the other details in the game, but mentioned elsewhere. I need to try and remember what all the sources are... -_-
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Troy's nickname "Child of the Sea God" was given for his major destruction of Razril and Gaien ships at a very young age (mid-teens, if my math works right) in command of a Kooluk fleet. He became like the Teo McDohl of Kooluk - everyone knew him and what he was capable of, and he became feared by the enemies because of how well he could do it.
As for the prince of Obel living, I shall pose another question - did you get all 108 stars? If so, that question should be answered if you watch the entire ending... ... Of course you have all 108 stars. You have Snowe. Duh to me. It's not so much theory as fact - it's not established directly in the game, like so many of the other details in the game, but mentioned elsewhere. I need to try and remember what all the sources are... -_-