His father is the Minister of Defence on Saturn, although nothing is known about his mother. At one point, Juli accuses Blue of planning to hand over the Ryvius to his father in exchange for safety (Blue doesn't confirm or deny this, saying simply and rather ambiguously, "What if I am?"). The implication that Blue's father wouldn't be willing to help his son or any of the others unless there was something in it for him indicates that the two aren't all that close (in fact, Blue's only comment upon hearing of the destruction of Hyperion and his father's death is, "What a way to go.")