I'm going to give my two cents here.
I think that arguing for Pacifism, when it's a Pacifism that makes our character actually ill to even try and fight, in a race that pretty much is defined by fighting, is not a good idea.
I'm not saying that I'm against pacifism, I think that it could work really well, but at the same time we have to understand that there are going to be people, reces, aliens, etc., that cannot be argued with, and cannot be reasoned with (I. E. Freezer, Cell, Babidi, etc.). So, for those cases we must be able to fight, we must be able to stand up for what we believe is wrong and fight against it if the other side does not listen.
Now, I hear arguments about how Dandeer should not be punished, harmed, killed, by us because it would result from our hatred, from our spite. But at the same time, we can see that Kakara hates her because she sees what she did as wrong. She has heard the arguments she made, the arguments her father made, and she is convinced that they are wrong. That is the central part of her hatred, that what they did to Jaffur is just plain wrong.
If she starts arguing for forgiveness, if she starts thinking thatshe should be pardoned, is the same as saying that what they did to Jaffur doesn't matter, and if that's the case, then why was she fighting them at all? Why did she not join them in sealing him? If we are forgiving her for her actions, then she clearly did nothing wrong.
Here I see that Kakara has her convictions, and it's beacuse of those convictions that she would at least argue for Dandeer not to be punished by her, but by the people that she has harmed (I.E. Jaffur). By that same token, she would not argue for her to be forgiven. Her actions, impulsed by trauma, or by panic, do not deserve to be forgiven.