sunandshadow said:
..being able to take any shape is a really powerful ability
It seems pretty powerful, but it certainly isn't the most powerful.
For example, if a shape-shifter suddenly appeared in our modern age, we could spot them easily (after the initial shock) with cheap pin-hole cameras scattered everywhere - if a filing cabinet suddenly morphed into a person, it would be detected.
Sure - they could pretend to be human (or a particular human) , but a humanlike opponent could do it anyway - just with decent makeup.
Being able to 'magically' appear to be a table or chair might be great - but in any 'real-ish' shapeshifter, they'd also have to change their colours, translucense etc to fool anyone. Sure, they'd probably get very good at it - but being very good at it isn't a 100% copy - the 'enemy' would also get very good at spotting ones that weren't perfect. You wouldn't need superhuman abilities - just like a fashion Nazi can tell the difference between a 'real' Prada handbag and a fake one.
And imagine if the shapeshifter was colour blind !
The reasons for a partnership might be as much political as military - like some military forces in Indonesia etc try to balance the number of each ethnic group in individual units. Or perhaps our mismatched partners in the buddy-cop drama ASSUME it is just politics that forces them together - before realising that they do make a good team.
Mac