Step 1: Starting from the depot you have to go up 2 floors using these stairs (doesn't matter which one you choose, both will take you to the same place)
Step 2: Now you will need to go upstairs another 3 floors, first using the stairs on the purple circle, then the ones on the yellow circle and finally the stairs on the pink circle
Step 3: Now all you need to do is walk to the north east and you will find Emperor Kruzak