Immediately get the Ether1, and continue to get a Tent. Next to the wounded soldier, there is an indent in the wall. Go through to get a HiPotion. Return through the top door. In the top right corner of the next room is a Kamikaze. Go down the stairs, and just under the sticky-out cliff, there is a passage in the wall. Go through to get a shuriken. Go down past the wounded soldier into the next room.
Get the three chests containing two HiPotions and a Cabin. Just above the rock is a passage in the wall containing two Elixirs. Follow the path down and go left to get a Silk Web. Go right to get two Lifes and an Hrglass2. Continue north and go through to the next room. On the right is a save point, so save and head on. Get the Soft on the left before continuing up. As you approach, you will see Rubicant and a ninja, the prince. After a short dialogue, they will engage in a battle. Unfortunately, the ninja gets slaughtered. Rubicant disappears. Rosa will heal him and he will join your quest. Go through the wall in the bottom left corner to get an Ether2, then continue upwards to enter the Tower Of Bab-il.