Compass chan is someone important in Kancolle game. If you are lucky and if Compass chan feels like giving you something good you may or may not get to where your destination supposed to be.
From my understanding Compass chan is totally unreliable and random in giving routes to player. A lot of player said they rarely have chance to meet final boss because Compass chan is a troll. Like I said before, totally unreliable. Not sure how did she/they get to be the compass.
There are 4 version of Compass-chan but wait that is not all, it seems that Compass chan is also a sub Boss. Perhaps you have to beat them in order to get to your destination.
Compass-chan need only 2 sheet of paper and her clothing is removable. It comes in .PDO and picture guide.