A lot of the claymores went in for revenge or the ability to protect themselves.
But Miria's ethical reasoning is far more complicated than the others. Clare seeks revenge on a definite Fi-pathway, but Miria's internal dialog went more like this.
"
The organization killed my best friend. They are evil and they must be destroyed." (This should be enough for subjective ethics (Fi). Fi goes off on what feels right to the user. After being forced to kill her best friend, destroying the organization should be more than justified)
However, Miria's ethical dialog does not end there. "
But what about the fact that the organization protects humans? If I destroy the organization am I condemning humans to die at the hands of the Yoma?" For her to be unable to take revenge on the Organization due to the potential suffering of humans, in my mind, can only lead to one conclusion. Miria is an ethical objectionist (Fe user) (Objective morality based on the benefit or harm of all, not subjective morality based on her own feelings).
*Miria finds out that the organization creates the Yoma*
"The Organization commits these evils against us, and creates the Yoma? They must be purged." Miria's focus is on what's morally right, not on her feelings. This is why I see her as an Fe-user. And if she were an Fe-user, her strategic sensibilities, confidence, and analytical nature can only be explained by a very strong Ni-Ti loop.