Possibility to add reins to the Seraphim tiger mount model?

[idbeholdME 388]

It is quite obvious that her poses and animations on the tiger were expected to have reins on the tiger:

In all the animations when attacking or idling, she holds one of her hands up, holding an invisible rein. Would it be possible to add it to the tiger model somehow? I am absolutely clueless when it comes to changing models or textures in this game so putting this out there as an idea for someone who might be looking for something to work on