Dylan

"I'm Dylan. I'm so cool, I want to date myself, but I can't figure out how! You want to date me instead? You're so lucky!"

- Leo Valdez

Dylan is a monster (storm spirit; ventus, Anemoi Thuellai in ancient Greek) posing as a boy who is partners with Piper on the field trip from Wilderness School to the Grand Canyon and the Grand Canyon skywalk. Dylan was born when Typhon was defeated by the gods in the Second Titan War.

The Lost Hero
Dylan takes Piper as a partner unwillingly at the Grand Canyon. When the storm arrives, he transforms into a Ventus, a storm spirit, son of Typhon, and pushes Leo over the side (Coach Hedge saves him), blasting Jason's shoe off with lightning. He is shocked (pardon the pun) since the blast could have killed 20 men. He then pushed Piper down the Grand Canyon and Coach Hedge told Jason to save her and he discovered he can fly. Although Jason battles Dylan and wins, Dylan escapes them and takes Coach Hedge, who is Piper and Leo's satyr protector. In human form, he is described as having a smile so bright that they should come with a warning label, a cowboy's jersey, and dark Superman style hair.

He says "The mistress calls me back" which implies that he works for a goddess who Jason, Piper, and Leo discover later on is Medea. Dylan knocks Piper (Jason saves her) over the Grand Canyon sky-walk and captures Coach Hedge (after attempting to capture Leo). It is later revealed that he works for Gaea.

Since venti can appear as either stormy angels or demonic stallions depending on how chaotic they are, it can be presumed that Dylan is not as chaotic as some of his brethren.

Appearance
In human form, he is described as having a smile so bright that they should come with a warning label ("WARNING: Do not look at teeth directly, blindness may occur"), a Dallas Cowboy's football jersey, and dark Superman style hair.

In Ventus form he is said to look similar, except no jersey and he is pale with glowing red eyes, and he is surrounded by strong winds.