Akero Zoldyck is a retired elite assassin of the Zoldyck Family, an ancient Nen practitioner, and the father of Zeno Zoldyck. At 160 years old, he remains one of the oldest known active Nen users connected to the underworld. He is regarded by several veteran Hunters as a figure whose presence predates many modern assassination methods and Nen doctrines. Despite his advanced age and seemingly frail condition, Akero possesses monstrous combat abilities and abnormal physical conditioning.