Nemo of Utopia
CHYOA Guru
Though that might be related with the third sentence of most futa stories being "her 15-inch long cock"
Pronouns will be Ka, Kae, and Kai throughout unless the reader chooses one of the paths where the children will re-diverge into male and female, which I'm seriously considering not going with at all as it raises more questions than it answers.
Furthermore, the colony crews are universally engineered to have penises that are large, but not grotesquely so: in the 7-to-9-inch range barring a few random sports that are as small as 5.5 inches (but always broader than average) or up to 10 inches, (but thinner than average,) with roughly an average of 1.5 inches being standard for thickness. (Though these measurements will be expressed in cm, I'm just more used to imperial than metric.)