You mean in Percy Jackson? Like, the series? If so, in the third book Bianca died to protect him and the others, so if she wasn't there he would've died. There's a reference to that in the fourth book with Nico and that freaky ghost. SPOILER ALERT: Nico doesn't mean Percy, he means that inventor dude that created the Labyrinth. (Sorry, long time since I read the series so I forgot names.)
No one can cheat death
Percy Julian died on April 19, 1975.
Don't cheat on your tests.He tried to cheat death.
Percy Pitt died at the age of 62 on November 23, 1932.
Percy Heath died on April 28, 2005 at the age of 81.
Walker Percy died on May 10, 1990 at the age of 73.
Percy Rodriguez died on September 6, 2007 at the age of 83.
The Man Who Could Cheat Death was created on 1959-11-30.
Cheat death
Percy Williams Bridgman died on August 20, 1961 at the age of 79.
Percy Lavon Julian died on April 19, 1975 at the age of 76.
Percy Bysshe Shelley died on July 8, 1822 at the age of 29.