- This page is about the TV character. For the books incarnation, see Katoa Merton (Books).
Katoa Merton is the son of Basia Merton and friend of Mei Meng who suffers the same ailment, Myers-Skelton Premature Immunosenescence and, is treated by the same pediatrician, Dr. Strickland.
- Katoa has not appeared on the show; however, his father has and Katoa has been mentioned in conversation between fathers as missing like Mei.
- An image appears in the season teaser trailer that represents the character having been hybridized by protomolecule, a process that was not completed in the novel.