Zeus

Zeus, formerly known as a friendly god (神様 Kami-sama, "God"), is a character that debuted in the original Kid Icarus.

Physical Appearance
In the original Kid Icarus, the friendly god appears as a balding man with a mustache and beard, adorning simple robes.

In Of Myths and Monsters, Zeus appears similar to his former appearance, only now he lacks his beard and possesses a halo and wings.

Kid Icarus
Known simply as "a friendly god," he resides within Sacred Chambers to grant Pit an arrow to increase his strength. He can also be found in Sacred Training Chambers, where he puts Pit through harsh training to deem him worthy of the Sacred Bow, Fire Arrow, or Protective Crystal.

Kid Icarus: Of Myths and Monsters
Known as Zeus, he behaves the same way as he did in the previous game, only now he is also responsible for granting Pit more life blocks depending on his score.

Trivia

 * Zeus is named after the Greek mythological figure of the same name.