Since Phaedra was taking careful aim I am assuming she wouldn't fire when other marines are in the way.
Since Cedric was all 'rapid fire pew pew' his shots ended up hitting Avel, Harm, and Phaedra.
The total damage from Cedric against the other marines wouldn't be enough to penetrate their shields, so feel free to respond to it how you want (I'm keeping track of the total DR loss elsewhere and will give you updates as to how bad the damage is, but I'm keeping the exact numbers to myself.)
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As for Matteo and Naomi, Both have lost their shields, taken some damage to their armor, had their weapons damaged, and lost use of some of the delicate bits like external sensors. Currently the only way they can see is through use of the support drones.
The ID-Sols they were fighting haven't disappeared , there just isn't enough left of them to identify.