SEG-EL | Envisioned here as athletic, quietly confident and in his 20s, comic fans are familiar with an older (and a bit grumpier) Seg from his appearance in the classic Starman No. 51, written by James Robinson with story by Robinson and David S. Goyer, who is executive producer/writer of Krypton. But Segs a good guy at any age; in the comics, he and son Jor-El (Kal-El/Supermans father) helped Starman get away while other Kryptonians wanted to detain and dissect the Earthling.
LYTA ZOD | This twentysomething beauty will likely have some familial tie to Supermans future foe, General Zod, while she herself is a (reluctant) warrior.
VAL-EL | Segs genius grandpa defied death by going into the Phantom Zone, and is a staunch believer in space exploration. (We know thats a lesson hell pass along to his great-grandson.)