Icarus

"Don't worry, Father! You're a genius! I trust your handiwork-"

- Icarus to Daedalus

Icarus (Ίκαρος in Ancient Greek) was the son of Daedalus, cousin of Perdix, and a grandson of the goddess Athena, which would make him a legacy. He is most commonly known for his attempt to escape Crete by flight, which ended in a fall to his death because he did not listen to his father.

History
He and his father were held captive by King Minos, after Minos' daughter, Ariadne, helped Theseus, demigod son of Poseidon, defeat the Minotaur. Icarus managed to escape on one of his fathers inventions: Wings made of metal feathers and wax, but he ignored Daedalus' advice and flew too high. The sun melted the wax holding the feathers together and the wings fell apart, causing Icarus to plummet to his death over the ocean. Daedelus then found the boy's body and buried it in a land called Icaria, which he named after his dead son.

Post-Mortem
In the Percy Jackson and the Olympians series, after Icarus' death, Daedalus was full of despair and became jealous of his nephew's intelligence and skill. After Perdix showed Daedalus some plans for an automaton that could host a human soul, he killed Perdix by causing him to fall out a window (by making him stretch too far). He was then punished by Icarus' grandmother, Athena, who watched the event unfold. Athena marks him as a murderer by burning a partridge on his skin. This mark appears even when he changes bodies that were made from Perdix's designs.

Percy dreamt of both Icarus' fall and Perdix's in his dreams before finally meeting Daedalus himself.

Trivia

 * On pannels showing the history, on airports or places like that, sometimes it shows Icarus as a first flight attempt.