Hermes

Whom the Romans called Mercury -- was the son of Zeus and Maia. He was considered to be Zeus's messenger, and often played tricks on people, starting when he was an infant.

Hermes had magical sandals which gave him the ability to fly. He also had the helmet of invisibility or the helmet of darkness that makes you invisible. Once, Hermes loaned Perseus, a demigod, his flying sandals so he could fly to Medusa’s house.

Since Hermes was the smartest of the gods, he invented many things such as the lyre, the pipes, the musical scale, astronomy, weights and measures, boxing, gymnastics, and the olive tree.

I think that Hermes is interesting because he invented many things, and because he was the fastest of the gods.