From everything Ive seen, Minthara is the most perspicacious companion out of the lot, and it does a bunch to endear me to her. It really does feel like she's trying to earn her place as your most valuable asset when she dissects the world, the things in it, and relates it to you and your quest in a way that feels much more intimate, much more desperate, than other companions. At least for me.

I think, only a mad dog can truly understand another.
[Linked Image from i.imgur.com]

Each time that he slew, Hurin cried: 'Aure entuluva! Day shall come again!' Seventy times he uttered that cry; but they took him at last alive.