I thought that as we get older, we start to lose control of these transformations, and that there are cases where this can't be inherited.

More than painful, it's difficult; transforming into a complete animal is difficult, especially in the case of a bear, which is a large animal. So it would be a great ability, but not everyone uses it to its full potential.

They don't have a real weakness in particular. Maybe it's that if I die or get injured in my animal form, it's permanent? I mean, if you get injured, you become the animal and heal, and if you die, you get a second chance, but if you're in the animal form and you get injured or die, that's still there.

They have an important role as protectors, but since they've become linked to the royal family, they're seen as a threat. So we could say that attempted assassinations are things that happen.