You know very well the situation of the Corps.

As a scout: You know what to do, avoid getting caught while protecting Eren and Historia.

As a Garrison: You are one of the few that Erwim trusts. You along with Commander Pyxis will support him when the time comes(which is Erwin's trial infront of the "King")

As an MP: you have two options for your scenarios, choose one only!:

1. Same as the scenario in Garrison. You will support Erwin when time comes.

2. You get caught along with Marlowe and Hitch by one of the scouts. It is up to you whether you'll help them or nah.

Either way, whatever your choice or position is, the success still lands on the scouts.