Eternal Arcadia/Upper City
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Unfortunately, it seems Fina was being held separately from the Air Pirates. Dyne overheard that she was taken to the Royal Palace, but to get there you'll have to make it through Upper City. Drachma offers to take the Air Pirates to the Little Jack, and they'll meet you at the docks with Fina. You'll receive Dyne's Yellow Moon Stone before you leave.
Make your way through the sewers, and you'll come to a ladder again - only to realise you're being followed. Marco has come after you to beg Vyse not to go into Upper City. His parents were killed for entering the rich area of Valua, and he's worried the same will happen to you.
Meanwhile, Lord Galcian has arrived at the Colliseum to investigate what went wrong. A guard tells him that Air Pirates have been seen heading towards Upper City, and he guesses that you'll be looking for Fina.
Back with Vyse, climb the ladder and you'll find yourself in Upper City - although depending on your tastes it's not a much nicer place than Lower Valua. You can talk to several people here, and there's a Save Point which is worth using.
Head up the stairs and Vyse will spot the train tracks below you. More importantly, he'll see Fina being loaded on by a couple of guards - but you'll never make it to the platform before the train leaves. Appalled by Vyse's decision to jump as the train goes past, Aika follows regardless and you'll find the pair running along the roof of the train.
[edit] Train roof
As you make your way towards the lead carriage of the train, you'll be open to random battles against varying numbers of Valuan troops. None of them are particularly difficult, but be sure to watch your health between fights or you might get caught out.
Once you've made it about halfway, the train gets a violent shunt from the back - turning round, Vyse is confronted with the sight of Galcian advancing along the train after you. If you're feeling suicidal you can run down and fight him, but it's an entirely unwinnable battle. Keep heading towards the front of the train and you'll find yourself in the lead carriage, where Fina's being held by two Royal Guards.
Royal Guards
Not really a boss fight per se, this can be a difficult fight nevertheless - not least because you haven't got Drachma to help out.
The most effective tactic is to work at one guard at a time, saving Spirit Points for Vyse's Cutlass Fury. Use Aika to focus and heal, although using her to attack can be helpful.
The guards don't have any particularly big moves, but one notable technique they've got is Counter Stance, similar to Vyse's Counterstrike. They'll take a defensive stance and counter any regular physical attacks.
With the guards taken care of, you'll be reunited with Fina - but the celebrations are soon interrupted by Galcian. Vyse and the Admiral stare each other down for a minute before something flashes past the window.
The Little Jack opens fire on the train, separating the front half of the carriage with Vyse, Aika and Fina from Galcian's section of the train. As the rear section of the transport grinds to a halt, Aika celebrates their narrow escape - but you're not out of the woods yet.
[edit] The Grand Fortress
You're still inside Valua, and to get out you'll have to make it out of The Grand Fortress before the door closes, with a Valuan cruiser blocking the exit. Fortunately, your newly-equipped Harpoon Cannon will help you clear out the obstacle.
Ship Battle: Valuan Cruiser
This is the first ship battle with an S.Cannon at your disposal. While the Harpoon Cannon is devastating against pretty much any ship, it costs an awful lot of Spirit Points to fire and can only be used on certain turns - indicated by a special icon in the Danger Indicator bar.
As with previous boss fights, Vyse and Drachma should be used to attack with Fina and Aika supporting by either healing or Focusing. Keep an eye out for any turns where you need to use evasive maneuvers too.
The goal of this fight is really just to charge up the 15 SP to fire the Harpoon Cannon; it should knock the Valuan ship out of the way leaving the exit more or less clear.
With the Grand Fortress closing fast, Vyse punches the Little Jack's engines to full speed, aiming for the narrowing gap between the wall and door. Sparks fly as Drachma's ship scrapes through seconds before the Grand Fortress locks down, giving Vyse the boasting rights to being the first person to ever escape from Valua's Grand Fortress.
