I'm constantly baffled by the absence of Rand in the novelisations and comics. She's promoted to a chief petty officer assigned to engineering by the time of TMP and that could have happened at any point after she ceased to be Kirk's yeoman.
Unless the authors were doing a novel clearly set in the early part of Season One, use of Rand was not encouraged.
The whole "chief petty officer" was never planned out. "The Making of ST:TMP" has a memo where the main cast's ranks were being clarified. There is a correction to that memo which states that Rand is a "Chief", as in Transporter Chief. Her rank insignia is different to everyone's stripe. Rand's metal insignia is a trapezoid shape on her epaulettes. There is even a "Get Smart" gag in the apology email, "Sorry about that, Chief".
In her unscripted ST III appearance, that was filmed at ILM in a hastily-fitted Starfleet maroon uniform which just happened to have Commander rank. In her "Starlog" interview promoting ST IV, Grace mentions how they were trying to determine a rank for her character and she remembered, "On TMP I was a 'chief'...", so it was decided to make her a "Chief Petty Officer".
She hasn't even featured in the Year Five comic run, which has brought back quite a few familiar faces.
But she was brought back for John Byrne's "New Visions" photo comic series. Byrne happens to like Rand.
Then when you consider that she was essentially the female lead, who appeared as often as Scotty, until real world issues intruded, it makes it even stranger.
Well, it could also be a result of the fallout of her contract. Grace had a 13-week contract, while some of the others were "day players". Grace took a chunk of the budget each week and the writers were not utilising her character as much as they should have been. There was a conscious move towards having variety in yeomen after her departure. This is reflected in the books. Grace's likeness is used in the early Gold Key comics, and then she disappears. Just like in the show. Especially in the early days, the novelists weren't inventing reasons for characters' unexplained onscreen departures.
I think her appearance in the First Adventure is apocryphal since the part is clearly written for Yeoman Smith (no way is Rand 16...
Possible. I suspect that Vonda McIntyre was originally trying to do something with Rand that didn't work out as originally intended, and it did not survive the studio approval process. This was the only novel with cover text praise from Roddenberry himself. There was also a request that Chekov be included because the book was celebrated a major anniversary.
IIRC, in "Enterprise: The First Adventure", Rand was once on a ship that went through a time/space dilation, causing her chronological age to not match up with her physical appearance. It did my head in trying to work out what was being intended. Was Vonda trying to say that Rand was only 16 at the beginning of the mission, but appeared much older due to the anomaly? (It didn't end up working out that way.) The young crew person was definitely something that appealed to Vonda. A bit Horatio Hornblower. (Vonda has Peter Preston being a very young midshipman in the ST II novelization, too).
I believe that there was some vague discussion about Grace's possible return in later seasons as a guest performer although the idea was nixed (she was originally intended to be the crewman who bought the tribble in the early draft) so that could be an indication that Rand could have been around, if not on screen. That said, when asked why Rand wouldn't be coming back David Gerrold was allegedly told that she had transferred off the ship.
Keep in mind that David would have started playing with his spec scripts after seeing the first 13 episodes playing on TV. By the time his scripts were being pitched (and there were several), and one accepted, it was clear that Grace's contract was not being renewed.
Grace always said at conventions that her least favourite episodes of all time were: "Dagger of the Mind", because Rand's promised juicy role was rewritten for Dr Helen Noel; and the 14th episode filmed, "The Galileo Seven", because it was the first one made after her contract had ended - and Rand's name was simply scrubbed out and replaced with Yeoman Mears.
Ro Laren left the Enterprise and returned with some new training, so why not Rand?
Essentially that's what fandom decided. She needed time to retrain as a transporter operator, just as Chekov retrained in Security between TAS and "Phase II"/TMP.
I think John Byrne didn't really like the hair so he was happy to formally write her out but he later regretted that so he bought her back as part of the ensemble with a new hairdo.
I dunno. I thought Byrne simply liked the idea of doing things with his photo comic that TOS had not done onscreen, but using elements that
had been onscreen. Formally writing out Rand was something that had not yet been done.
Hairstyles never stay in fashion very long. It would be odd that Rand hung onto that elaborate, unique basketweave for too long, especially after time away from the ship.