Ezor: Acxa are you straight or normal.
Zethrid, hands clasped around Keith’s neck: Choose wisely.
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Ezor: Acxa are you straight or normal.
Zethrid, hands clasped around Keith’s neck: Choose wisely.

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Zethrid helping Ezor get up... seconds before in an alternate timeline, Ezor was blown to bits.
Another interesting 7x3 detail: Until Keith joins her, Acxa does not fight Ezor and Zethrid with intent to hurt, but with intent to escape. In the former half of their fight:
Acxa evades. She briefly incapacitates Ezor through whip-tripping her, and when Ezor chokes her, she throws her into Zethrid -- but her primary focus is on her escape.
Meanwhile, Ezor and Zethrid throw punches and kicks and chokeholds and things of the like left and right.
When Keith appears:
Acxa lands two punches and four kicks (five attempted, two not pictured) on Zethrid.
There are a couple of possible explanations for this. 1, as this post implies, Keith's presence is the trigger. 1.1: Keith's presence triggers Acxa's protective instincts; she battles Zethrid with her full might with intent to briskly overpower her so she can intervene with Ezor's duel with Keith. 1.15: it is because Keith saved her from Ezor a moment prior, and Acxa wants to repay the debt. 1.2: Keith choosing to be there for her shocks Acxa into the realisation that her life is worth fighting for. Many, like Lotor, like (perhaps inadvertently) Coran this episode, have considered her disposable. Acxa has internalised this idea. Keith coming to her rescue without real reason beyond *she deserves it* has her rethink (perhaps only on a subconscious level, but still). 1.3: Acxa does not want to hurt her friends, but if they hurt her mission (Keith; the Paladins' safety), then she will stoop to the last resort. 2, Acxa is angered into proper violence by the escalating nature of Zethrid and Ezor's taunts and blows. This is a weaker argument than the former because Acxa's anger problems were only really facilitated by Lotor's abuse (calling them 'anger problems' feels wrong: they were not externally prominent, and they did not impact her work), and regardless, she's unhealthily emotionally detached. Lotor treated her like garbage and she still believed in him until the very end. It's unlikely Ezor and Zethrid's playground taunting would have shaken her; what she had with Keith was hardly a relationship, let alone an insecurity. It only revealed how poorly they knew her.
100 Ezors and Zethrids vs not giving into the desire to choke Keith and Acxa:
Wow, Zethrid has literal claws...

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I think that
Ezor realised that Acxa caused the breach right here. Where Zethrid angrily hurries off, Ezor is frozen in confusion. In the third shot, she appears tender/sorrowful, and given her nature, we can ascertain that it's certainly not for Pidge's sake; and in the fourth the anger(-filled realisation) fully sets in.
In addition,
upon their ceremonious reunion with Acxa, Zethrid expresses surprise at her (sort of) betrayal, while Ezor -- not to be caught on the back foot -- immediately goes right for the psychological jugular.
Ezor and Zethrid's logo vs the Galra logo:
I can't say I know what the distinction means, exactly, but I felt it was important to point out that it was there.
In 'The Way Forward', Ezor is provocatively violent. Ezor is the one who kicks Lance, who chokes Pidge, who needles Acxa. Before, Zethrid ached to do violence, but when she feels it's safe to stand aside, she lets Ezor wreak it in her place, for her enjoyment. Only when things get truly dire (the Lions and Paladins escape, Keith is in the process of defeating Ezor) does Zethrid truly pull out her punches (you'll notice that Keith and Acxa's near-defeat occurrs thanks to her: she single-handedly tosses both across a corridor into some kind of storage unit). Violence ceases to be a pastime for Zethrid; with Ezor she feels content enough to let her take the reins.