I: He knows about Santa Claus and Christmas. He does not care, and is not interested in participating for Reasons. He will be avoiding the pestering robots for as long as he can. Eventually though, he does have a couple of letters that he could use some help with.

II: Nico is getting his Hades figurine. Sort of. It will have the wrong god's face. It's very distressing. Someone please help him fix it.

III: Oh hey. Something that might actually get him to participate. He touched ghosts. He thinks his message is pretty cool. Feel free to disagree.

"He dug deeper and called the dead to join Him while the Winged Lord spread life further and deeper upon the surface. So the two chose their domains.

In the core of the star, He nested. The dying sank to Him and He welcomed them with open jaws, ever hungry. Their bodies became the rock, became the soil, and so grew anew. Above the world, the Winged Lord circled, delighting in all that He had brought. But a deep sadness came upon Him as he watched them sink into the soil, going to His friend, His enemy, the one which He could not reach."

As for dreams he can't control and sleepwalking, that's way less cool.