"I...wait, the Underworld is 'kind of a bummer'?" Zagreus says, looking at Percy with a nonplussed expression that suggests that no, Zagreus does not actually think it is 'a bummer'. "And...it's a bit complicated. Father and I...we haven't always gotten along. Mostly haven't, actually."

So at least Percy's not the only one with a difficult relationship with his father. Not even divine children get to escape that Fate, it seems.

"And Mother wasn't around when I was growing up. So when I learned that she existed...I had to leave. I had to go look for her. Father wasn't very happy about that. Meant I had to fight all his Wretched Shades to get to the Surface. That's what Lord Uncle Poseidon helped with, along with the other Olympians. Their boons gave me the power I needed."