All of my Captains are human lesbian/gynophilic futas or transgirls. I base them off of OCs in stories I've written. I have eleven of them currently.
First is Amalia, a kind futa and a submissive top. Second is Luvia, who's more irreverent, dominant, and switchy. Third is Olivia, who's trans and a kind bottom with omega fever. Fourth is Leanna, a more mischievous and dominant top transgirl. Fifth is Nora, a Treated, power-bottoming futa who's on the mischievous side when she isn't dumb for cum.
Sixth is Nava, a hardass top and the destroyer of Myrellion. Seventh is Hermione, a transgirl who's submissive and switchy. Eighth is Sophia, a mischievous sort with thoughts of becoming a harpy. Ninth is Drew, a ditzy, dominant top. Tenth is a futa self-insert of mine who, in addition to being a power bottom, is planning to blow up as many planets as she can on her quest for the probes. And eleventh is the horsehung mercenary futa Bianca. Made for quite the funny meeting when she encountered the foxy doctor.
Generally Luvia is my main, as she is the first character I've made in this round of saves. I've had others in the past but they got deleted by my computer. Her save in particular is going through its second in-game year.
One of them is Meadow, who's famous for spending well over a century creating tens if not hundreds of thousands of offspring, most of whom she gave birth to. I am not exaggerating those numbers.
Someone quoted Nonesuch saying that she should be the final boss in a Battle of Yavin IV-style mission whose offspring are her respawning minions.