Rick Grimes Jr. (TV Series)

"Mama, I'm hungry now."

- Rick Jr. to Michonne.

Rick Grimes Jr., nicknamed R.J., is a survivor of the outbreak in AMC's The Walking Dead. He is the son of Rick Grimes and Michonne, the half-brother of the late Carl Grimes and Andre Anthony and the adoptive brother of Judith Grimes. He resides in Alexandria with his mother and sister.

Season 9
R.J was conceived shortly before the disappearance of his father and was born 9 months later.

"Who Are You Now?"
Six years have passed since the disappearance of his father, a 5-year-old R.J. is now living with Michonne and Judith in their house in Alexandria.

As Magna sneaks around outside of their house with another knife, she opens a back door slightly but sees Michonne pick up and hug R.J., which prompts her to leave.

Later, after Michonne and Judith's conversation, R.J. runs up to Michonne and asks for food, as she picks him up and hugs him once again.

Michonne
Michonne and R.J. appear to have a loving mother and son relationship. He is first seen running up to her and she picks him up. Their interaction is very loving.

Judith Grimes
Judith and R.J. have not been seen interacting yet. But it's assumed that they have a loving brother and sister relationship as they live together with Michonne.

Rick Grimes
Rick is R.J.'s father. He doesn't know of his youngest son's existence as he disappeared before he could find out that Michonne was pregnant. It is currently unknown how R.J. feels about his father or what he's been told about him. R.J. is named after Rick.

Season 9

 * "Who Are You Now?"

Trivia

 * Rick Jr. is the sixth known child in the TV Series to be born into the apocalypse, the first being his sister Judith Grimes, the second and third being two unnamed infants living at the Kingdom, the fourth being Gracie, and the fifth being Hershel Rhee.
 * Rick Jr. is Rick's only known living blood relative in the series. From his older half brother Carl's death in "Honor" until his revealed birth in "Who Are You Now?", Rick had no known living blood relatives.