How can I move acccessory for pose?

Hello there! I just started making poses, and there is one thing I still dont get. What should I do to move an accessory in my pose? 

As you can see, in  blender the blade is down, but in game it is up.







I need to understand if it is possible to move an accessory for a pose? Or the accessory always positioned as it was originally attached?

Thanks in advance to those who respond.