Bessie is B.J. Blazkowicz pet dog
After rip Blazkowicz kill her
Bessie soul went to search for new body for 41 years
Until Bessie soul find one
Panzerhund
She managed take over panzerhund robot dog in the factory
And cut off the online system in the body so can  nazi can't shut her down and turn it off and also track her
Bessie escape the factory went off searching for B.J. Blazkowicz to reunite for him

B.J. Blazkowicz was about to captive by Nazi that surrounded him in the forest
Bessie saved and kill the Nazi soldiers

B.J. Blazkowicz was surprised

It realized his dog Bessie soul  is in panzerhund

Bessie finally reunited B.J. Blazkowicz

Bessie has getting upgraded

Front legs has replaced with sharp claws arms and hands
She had headlights
And spike tail

2 Thrusters that can either switch to boost her running or flying

Bessie has a seat so can B.J. Blazkowicz  or everyone ride with her
And man the machine minigun turret