What's in a name?
Everyone's been focusing on the "C&A" offices that Pomni ran through and how that's probably a reference to the Biblical story of Cain and Able, but personally, I'm more interested in something else that I haven't seen nearly as much discussion of: Pomni's name.
Why "Pomni"? I mean sure, that was the first 5-letter combination the randomize came up with that wasnt "Xddcc," but surely the must have been something deeper behind the scenes!
Well, Pomni might be more pronounceable than Xddcc, but it still doesn't mean much. At least, not English. If you speak Russian, you might recognize her name as "помни",^[a quick search of Wiktionary suggests this word also exists in Czech and Macedonian, but Russian is the language I know so that's the one I went with] which means "remember", particularly in the imperative form of the verb (aka, the form for telling someone to remember).^[Wiktionary definition]
So, every time someone addresses Pomni by name, they're literally telling her to remember! Unfortunately, Pomni does not seem to know Russian, so this goes right over her head. (I checked the official Russian dub, her name is still Помни ("Pomni" but in Cyrillic) but it isn't acknowledged any further because of course its still just a translation of the English version)
What does she need to remember? Well, that's where the other theories come into play. But I think Pomni slowly remembering what went down at/with C&A over the course of the series will probably be a major plot point and perhaps also the key to getting them out of the Digital Circus? And I don't know if we'll end up meeting their real-life versions at all, but if so, I'd guess Pomni is probably going to be a Russian woman