Isaac Netero
Isaac Netero led the Hunter Examination Selection Committee and served as the Hunters Association's 12th chairman. Being a prominent character in the "Chimera Ants" arc, a posthumous overarching deuteragonist of the "13th Hunter Chairman Election" arc, and a supporting character for the first few arcs of the series, he was one of the most powerful and oldest characters in the Hunter × Hunter series. That's why he is considered as one of the best elderly anime characters of all time.
Isaac Netero is one of the most renowned shonen characters ever, as anyone who has watched the 2011 adaptation of Hunter x Hunter would attest. Without him, the highly regarded Chimera Ant storyline of the show wouldn't be as well-known. Netero was regarded as the greatest Nen user in the world when he was younger. By the time he rose to the position of senior chairman of the Hunter Association, this had changed. But it would be a grave error to believe he was a frail old guy.
Although Isaac Netero appeared to be inattentive and silly most of the time, he was obviously passionate about fighting. A very formidable foe or an incredibly challenging goal are the best ways to stimulate his senses. Fortunately for him, Meruem was an incredibly powerful opponent. Although their epic battle may have resulted in Netero's death, I'm sure he relished the challenge and thought he had a long life. Furthermore, even as they grew older, Netero, Master Roshi of Dragon Ball, and Hiruzen of Naruto all showed a noticeable fascination for curvaceous women.
Anime: Hunter x Hunter