8) and Episode 111, Igaram returns and is revealed to survive the explosion made by Robin.

How did Robin save Luffy?

Luffy is stuck in the middle of the quicksand and tries to struggle out, but is being covered in the sand. Nico Robin saves him by using her Hana Hana no Mi powers and asks him about the "Will of the D", also haven retrieved Luffy's hat back.

Why did Robin help the straw hats?

Nico Robin joined the Straw Hat Pirates at the end of the Alabasta arc because she wanted to die and Luffy chose to go against her decision and saved her life. ... Robin was found out by the CP-9 and asked to turn herself in as she could read the Poneglyphs and could help the World Government revive the Pluton.