Chibiusa is the true protagonist of Sailor Moon. At first it seems like Usagi is the chosen one but as soon as Chibiusa appears it's revealed that Usagi's story is little more than a stepping stone in her future daughter's adventures. Chibiusa's existence ensures that Usagi has no other choice for her life because her future is already decided. Meanwhile Chibiusa's future is shrouded in mistery so she can live however she wants. She is free and the whole universe is her oyster.

I don't think having a child is what ends Usagi's story but I think locking herself in an infinite time loop where she has no choice but to retroactively lay out every event of her life ensure the existence of one specific offspring is what makes her life not her own. Usagi's life and role is inevitable. Chibiusa is the chosen one.

>>281174438 (OP)
Chibiusa wasn't even there in the original first season, and she leaves for the grand finale in the last season.
There wasn't really much point to her sticking around after Usagi dealt with the Black Moon Clan, anything past that just shows she doesn't really blend well with the rest of the cast since everyone is much older than her(mentally, at least), and focusing on Chibiusa proved to be a liability especially to the 90s show in SuperS, which is probably why Stars immediately sent her back home.

>>281175250
Yes and no. The ironic twist is that she's centuries older than all of the main cast and mentally more mature, though this is more obvious in the manga and Crystal but there are hints of it in the 90s anime too. Chibiusa and Mamoru were both pretty disliked by some of the 90s anime staff and one of the directors kept trying to find a way to kill Mamoru since he was a yurifag but he went on to create Revolutionary Girl Utena so it's not surprising. Mamoru was mostly written out of Stars too, where Usagi has an emotional affair with Seiya while he's gone, but after she's had her fun she goes back to her Mamo-chan and the status quo is saved.

>>281175672
>yurifag director
>when the anime explicitly makes the senshis interested in male characters in the OG, unlike the manga
That part doesn't sound right to me

>>281175865
Bisexuality is common in yuri, but beside the point, in the 90s the inners had superfluous one-off crushes on dud guys occasionally but their deepest bonds were with other women. The inner senshi aside from Usagi were all single by the end of the series, while the outers were a happy lesbian polycule. The anime went out of its way to make the Mamoru Usagi relationship feel weird. I'm sure it wasn't unanimous because they do have some genuinely tender moments, but Mamoru was pretty slandered in the old anime. He had the vibe of an old creepy incel who knocked up the 14 year old he was grooming and stayed with her out of obligation. But his manga self was closer to her she and was a lot more attractive.

>>281176433
It sounds extremely counterproductive to me to add male love interests that didn't even exist in the source material, if the intention is to make them come across as possible carpet munchers.