Appears In
Quick Facts
| Gender | Male |
| Role | SUPPORTING |
| Series | One Piece |
| Race | Human |
| Voice Actor (JP) | Kiyohiko Shibukawa |
| Voice Actor (EN) | Steve Young |
| Occupation | Scientist |
| Residence | Alchemi |
| Affiliation | Myskina Family |
| Spouse | Livia |
| Daughter | Olga Myskina |
| Debut | Heart of Gold |
| Voice |  Kiyohiko Shibukawa 渋川清彦 |
Contents
Personality
Personality
Acier is eccentric, intelligent, and deeply devoted to his daughter. His scientific work is driven less by wealth than by desperation to save Olga from a fatal illness.
He can also be absent-minded and comedic, particularly in his interactions with Luffy.
Abilities & Powers
Abilities & Powers
Acier is a brilliant scientist responsible for creating Pure Gold, a material whose light can slow biological aging to an extraordinary degree.
He is also skilled with mechanical systems and traps, having designed much of the infrastructure surrounding the hidden Pure Gold on Alchemi.
Story Role
Story Role
Acier's experiments create the treasure that drives the entire conflict of Heart of Gold.
He survives inside Bonbori for approximately two hundred years because exposure to Pure Gold slows his aging. After meeting Luffy, he learns that Olga is also alive and joins the effort to rescue her from Mad Treasure.
Relationships
Relationships
Olga Myskina is Acier's daughter and the reason he creates Pure Gold.
Livia is his wife. Monkey D. Luffy becomes Acier's ally inside Bonbori, while Mad Treasure seeks the treasure created by Acier.
Related Characters
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SUPPORTINGMad Treasure
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