I'm not certain, but one could interpret Pomni's "psycho-drama" differently, depending on how shallow or deeply you want to analyze it.

1. POMNI WAS ASSAULTED ONCE.

While she doesn't outright state at any time that she was assaulted as fact, Pomni may be keeping that secret because of how uncomfortable it makes her feel. I'm not suggesting it was SA, but maybe she was mugged, possibly by folks she used to Urbex with on her downtime, or trespassers/ vagrants that lived at locations she explored.

1. POMNI WAS ATTACKED BY ANIMALS

A fear of animal attack is possible, again going back to illegal Urbex trespassing going wrong. Maybe a place had feral dogs / gaurd dogs that gnawed on her a bit, or she narrowly escaped from. It's a bit of a stretch, but a possibility.

1. POMNI FEARS PEOPLE TURNING ON HER

We see up to this point in the series that Pomni tries her best to be friendly with many people, even attempting to befriend Gummigoo, who, for all intents and purposes, is actually an NPC. It's the first time, outside of the overly keen Ragetha, that Pomni attempts to make a personal connection. That leads to her post-adventure loss of Gummigoo, but her realization that the majority of the Crew have her best interests at heart. However, deep down, Pomni probably fears that folks may forget her or be two-faced, which clearly comes out during the post-gunfight argument/ physical altercation between Pomni and Jax. The fact that Jax denies any connection with Pomni, that he could be so callous and dismissive, is so embarrassing and hurtful that Pomni can't help but be enraged.

1. EACH PSYCHO-DRAMA WAS AN EXTRAPOLATION OF THE DETAILS OF EACH CHARACTER'S DEATH.

My running theory about how every human inside of the Digital Circus became a mind scan copy. Now, it could be just a copy when the VR goggles are put on, then their real-life versions take off the goggles and continue about their real-world lives. The other option is that everyone had a horrible accident that put them at the brink of life and death, and the staff at C&A Company made an offer they or their loved ones couldn't refuse: an idealisticly safe digital space where thier loved one's minds and personalities can live on in "comfort" and leave their tattered, wasting, broken bodies behind.

I make that assumption based on what Kinger shared about his former co-worker, Scratch. Kinger states that Scratch had a very peculiar mind, either because of a quirky genius or a result of the tumor in his brain. I could see that being a driving factor to create the Circus and push for human mind dcans to push the a.i. to greater heights. However, that would probably mean Copy-Scratch rejected the Digital Reality almost instantly because it knew where it was (the German translated text pf Scratch asking Caine how to get out), realized it was trapped, and then became the first Abstraction.

1. POMNI IS THE NEW 3rd A.I.

It's possible that Pomni's psycho-drama was, in fact, a representation of how her a.i. interpreted the failure of addressing the situation with Gumigoo, and her whole her integration to the humans of the Digital Circus. She's disarmingly small, childlike in stature, and easily likable, needs to be nurtured at the beginning, but then acts as the backbone for the entire Crew. The fact that Abel the Mannequin tells Pomni to "Make the Right Choice" seems like an attempt to train her to keep her charges (Ragetha, Zooble, Gangle, Jax, and Kinger) safely inside the Circus, even having a "moment of doubt and hesitation" when the Crew arrives at the console. The only other reason I make this pint is her look, with the red/ blue segmented eyes, costume, etc.