An object that has 0 rotations displays the local axis that's not aligned to the global axis.
Please see the following picture.
All parent objects have 0 rotations.
How can I re-align the local axis to the global axis?
The object itself has a few child objects, and that child objects' local axis and rotations must not be changed.
Blender version is 2.19.0.
The object and it's parents' delta transform rotations are all 0 too.
I've included the blender file that has the problem - using Blend-Exchange (Please see 'Front Arm' object):