Hermes watched with interest as Apollo and Aphrodite's daughter looked all through Caligula's shoe boat. (Hermes thought Caligula's shoe boat was fine, but it was nothing compared to his. Hermes still had shoes from the Classical Period, Caligula's collection only ranged from the early 1rst century at the least) As the god of thieves Hermes thought it hilarious that Apollo the former god of truth (no, no the current, he still was a god, this stint as a human was just temporary, just like all the other times) was stealing.

Hermes did his best to keep them from being noticed of course. He couldn't have his half-brother caught, before he found Caligula's caliga. That wouldn't help anyone.

Hermes knew that technically, Zeus couldn't do anything, as the god of thieves Hermes was well within his rights to help Apollo and Piper find those shoes.

Course as the god of travelers he was well within his rights, to help Apollo with next to anything that pertained to travel, like say, changing a driver's license so that instead of reading as a learner's permit, it now read as an unrestricted license, for example.

"What are you doing?" Hermes jumped up from watching Apollo and Piper just as they found the right shoes.

"Oh, hi Athena" He said. "Just checking in on the mortal world."

"Uh-huh" Athena said joining him. "You've been spaced out for days. I'm not stupid you know I know what's taking up most of your time."

Hermes raised an eyebrow.

"Apollo, maybe human but he's completely capable of taking care of himself you know." Athena said. "He doesn't need you watching over his shoulder."

"I am allowed to be concerned. You heard his oath on the Styx just like I did, and he's been braking it- "

"He could do with a lesson in not making stupid promises he can't keep." Athena said. "You heard what Zeus said, we can't be involved."

"That's bull" Hermes said shaking his head. "And you know it, how can Apollo defeat the triumvirate if he's dead?"

Athena raised an eyebrow. "You think Apollo will be killed?"

"A think he's going up against three people who are very hard to kill." Hermes said. "Not too mention he'll be facing Python powerless-"

He stopped and paused. The air suddenly felt different. It almost seemed to crackle with electricity.

Hermes turned his attention back on Apollo and what he saw nearly made his heart stop.

Apollo-kneeling on the ground-pointing an arrow at his own chest.

Something must have shown on Hermes face because Athena looked at him in confusion and worry.

Hermes couldn't believe it couldn't take his eyes of what he was seeing. There was just no way. "Look!" Hermes shouted. "Look at what Apollo is about to do!"

Athena looked at him for a moment as though trying to decide if Hermes was playing a trick on her. Before she turned her attention to what Apollo was doing.

Hermes saw Athena's eyebrows rise.

He saw his chance to convince her and took it. "We have to help him."

Athena shook her head. "And what of the others?"

Hermes rolled his eyes. "We can-" But before he could say another word he saw Apollo shove the arrow straight into his chest.

Hermes nearly pulled Apollo back to Olympus. To heck with the rules, when Athena clutched his hand. "Wait" She whispered.

He would have told Athena where to stuff it but then he saw it. Medea saving Apollo.

After that everything happened so quickly. Hermes remembered relief when he realized that Apollo was ok, but then…

Jason… Jason attacked and fought Caligula as hard and as valiantly as he could, but in the end… Caligula stabbed him through the back. Hermes didn't have the heart or the emotion to do anything just stare dumbly.

He heard Apollo's plea, for anyone to save him, but he had been following this quest too closely and he knew Jason's heart too. Jason, for Piper to live, had to die.

Hermes couldn't tell you what happened after Jason died. Watching what happened on the yacht just, took too much out of him.

A/N Idk does this seem OOC.
Writing this I feel like Artemis would have been similar, but she realized what had happened too late. Where as Hermes realized what had happened as it was happening.