Character analysis

My character, woman 1, is recovering from a traumatic incident. I get from her that there is a certain disconnect that she puts up trying to avoid the optic, but in this situation it all falls down. She has just witnessed the aftermath of a plane crash, which is equally as traumatic as witnessing the happening. Compared to the other two, I feel that she is the most emotionally strong, however something like this still causes her to break. With the emotional strength, the breakdown is going to be twice as traumatic, and I have to convey that. I can do this by raising and lowering the volume of my voice, shedding a tear or two, wavering my voice, and showing the emotion in my eyes.