Yggdrasil

Items found: None

Your characters will look very small in the gear hangar, but move faster. To the North is a Gear Shop (Upgrade first, worry about accessories later, they're too expensive for now) and a bit more to the North lies a small door leading the main hallway (If you want to skip ahead and not visit the Yggdrasil, jump this paragraph.). The first door to your East leads to Marge's room (You'll know who she is later); the first and second door to the West lead to the dormitory (Talk to a man there to sleep if you want); the second door to your East is the nursery; the door to your North leads to the Gunnery Room where Maison will sell you character items. If you go down the stairs you'll go past 2 vacant rooms and reach the Engine room.

Now go back to main hallway and to the third door to your West (there's man looking at a plant besides the door) to get on the elevator (You cant go down yet). Ignore the stairs and go talk to Bart and Sigurd on the navigation room. After some scenes, you'll be at the residential area of the hideout. Leave following Citan and Maison for later and go check the area. The door to your North leads to another dormitory where you can also save; the door to your East leads to the planning room; The door to your South with a warning leads to Bart's room, where you can get an Iron Whip (Ignore the warning :P); lastly, to your west there is an exit and the door Maison opened. Go after Maison to the dining hall and after some conversation follow them to the planning room (You can stop and shop at the dining hall, but there's nothing you haven't bought yet on the Yggdrasil). After another scene, go back to the Yggdrasil (you'll have to wait for the platform's return) and Fei will talk a bit more with Bart. Now instead of going inside the Yggdrasil, go to the other platform, use another platform to go down and talk to the mechanic about Weltall. After this there'll be another scene (Will they ever stop?) and you can go sleep at the residential area (If you want to level up a bit first, go outside the hideout and have fun. Remember there are many giant enemies outside though).

When you wake up, the base is under attack. After some scenes, you'll have to, go down and fight the Gebler units. None of them should be too hard. Just use your best attacks against Schpariel (Bart and Citan will join you on this battle). After your victory, make sure you upgrade Heimdal. When you're ready, go talk to Sigurd to start the operation to Rescue Margie.