But that was the
second time. Post-TMP, and Transporter Chief Rand was marrying a non-corporeal alien (was to have been a Medusan, but not allowed by the contract Marvel signed for TMP tie-ins) and leaving the galaxy on a no-return mission. Except she did come back.
Yes! I remember that one. I think her only other appearance in the run after TMP was being stunned at the transporter controls. She was cited as a lieutenant-commander and re-joined the crew at the end of the issue after ditching her mentally ill husband. Classic 60s - 80s reset button. I didn't know it was to have been a Medusan - that would have been much cooler.
I used to like it when the supporting crew were included in landing parties. I think everyone, including Chapel and DiFalco got landing party duty at one point or another. This was Rand's only major appearance in the issues I own.
Rand is actually a complicated character (although I don't know if that was intentional or just from inconsistent writing). She seems to be very deferential and efficient on duty when dealing with senior officers but much more collaborative and convivial with the junior officers, with jokes and quips and suggestions. She's also willing to tease Spock while off duty (and his inappropriate comment in Enemy Within is a bit less creepy if you accept that they were friends off duty). The overall picture is actually quite a realistic workplace dynamic.
I think most of Rand's appearances have been quite flat in terms of her personality - yes sir no sir interactions - or as a cypher to deliver plot points. It's true that one of the Yeomen's purposes apart from being eye candy to lure in a male audience (which doesn't help in literature), was to ask questions for Kirk, Spock, or McCoy to explain to the audience at home, so asking dumb questions was baked into her personality, but her major appearances have not really channelled her sparkle or her humour IMO. If Rand had been replaced with any other character (and Kirk seemed to have an endless sea of exes) the story would not have looked off.
After their scenes in the Man Trap, I think her post TOS scenes with Sulu tend to be the most accurate, and the way she teases Tuvok seems reminiscent of her relationship with Spock.
If there was an official or even unofficial edict not to use Rand outside season one era stories, or possibly due to contractual issues prior to her return to the franchise, this would explain the character's absence from other stories over the years. It's quite hard for me to fathom otherwise. Just think how often TOS stories could have passed the Bechdel Test if Rand had been kept around.