Jason is a year younger than Percy meaning he is 15 years old
Jason Grace is 17 years old in "The Mark of Athena."
15 years old
Mark Grace is 47 years old (birthdate: June 28, 1964).
13
14-15
Thalia grace ran away at age seven when her brother Jason son of Jupiter disappeared at age two
Fledgling Jason Steed, by Mark A. Cooper
Athena did not have a.ny children
Athena is a immortal; immortals are ageless.
Athena would be about 3000 or 4000 years old.
Athena Chu is 41 years old (birthdate: October 25, 1971).
Athena was born a immortal goddess.
Grace Windkloppel Wexler
Jason is 11 years old!