Riordan Wiki

Do your worst!

–Arnold before the game show segment of the Orientation Film in, Camp Half-Blood Confidential.

Arnold Beefcake is a Greek demigod son of Ares who attended Camp Half-Blood in the 1950’s.


Arnold was born to Ares, the Greek war god, and an unnamed mortal mother. When he was old enough, he was brought to Camp by an unknown satyr.

The Trials of Apollo

Camp Half-Blood Confidential

Arnold took part in a game show segment of the camp Orientation Film along with Bea Wise and Ferdinand Underwood.


Arnold is a muscular teenage boy with short dark hair.


Arnold is shown to be a show off and not think things through.


  • It is unknown if his surname is really Beefcake or if Apollo was just saying it due to not knowing.