Arc Egghead follows the Straw Hat Pirates as they venture to a futuristic island where they encounter the legendary scientist, Dr. Vegapunk. However, upon arriving at Egghead, they discover that Vegapunk has become the target of the World Government.
The government has sent CP0 agents to eliminate the brilliant scientist, as they are conducting research on the Vegapunk technology. Naturally, Luffy and the crew are not going to sit idly by while this unfolds. Therefore, they devise a plan to escape the island, but this becomes increasingly difficult when Seraphim, Kizaru, and even Admiral Sentomaru arrive at Egghead. The situation is becoming dire and harder to control.
In the One Piece Final Saga, this arc marks the beginning of numerous secrets and intense battles. While many crew members of the Straw Hats are highlighted, Nico Robin has been put through a lot, leading to her significant character development.

How has the Egghead Arc affected Nico Robin?
The turmoil occurring in the Egghead arc of One Piece brings back some of Robin’s darkest memories.

After arriving at Egghead, Robin discovers that Saul is still alive. She had spent 22 years believing that the man who had cared for her was dead, while she was still grappling with her past. However, she barely has time to process this revelation as the threats continue to emerge.
Robin is injured during a prolonged battle, but the most terrifying moment for her comes when she faces Saturn, who seems to be a significant figure connected to the tragedy of Ohara and the horrors she endured in the past.
Seeing the destructive actions of the government in pursuit of her, Robin regains her composure and strives to keep her emotions in check. However, Vegapunk’s presence begins to unravel, revealing all the hidden secrets he knows about the World Government. Notably, the shocking revelation of Professor Clover’s association with the ‘D.’ family comes to light.
Throughout this time, Robin has shown signs of mental strain as she cannot keep up with the overwhelming influx of information regarding her traumatic past. Despite this, Robin has been put through many challenges during this arc. Her psychological state is a major reason preventing her from fully engaging in her role during this segment. Meanwhile, everyone else in the Straw Hat crew is busy focusing on their tasks.
Even in the most intense moments, Robin still struggles to maintain her composure. While the Egghead arc forces her to confront her deepest fears, the upcoming Elbaf arc may present a significant turning point for her, where she could potentially reunite with Saul.