The question about characters in 'Hunter' is tricky because I think the term refers to the webtoon 'Solo Leveling' originally called 'Only I Level Up'. The main character is Sung Jin-Woo, who starts as the world's weakest hunter, earning him the nickname 'the weakest hunter of mankind'. His transformation is the core of everything. He gains a mysterious power called 'the System' that lets him level up uniquely. The way he goes from being utterly pathetic to commanding an army of shadows never gets old. Some fans focus too much on his power scaling, but I always cared more about how his personality calcifies; he becomes colder, more strategic, almost detached, which makes sense given his trauma but can feel a bit one-note after a while.
Other key figures include Cha Hae-In, the S-rank hunter who notices Jin-Woo's scent—a weird but memorable detail. She's strong but weirdly underutilized; I wish the author gave her more to do beyond the potential romance angle. Then there's the Monarchs and Rulers, the god-like beings behind the gates and dungeons. They're more like forces of nature than characters, but their conflict explains the world's mechanics. Thomas Andre and the other international hunters show up later to highlight Jin-Woo's growing global significance. Honestly, the most compelling 'characters' might be his shadow soldiers, especially Beru and Igris, who have more personality than some of the human cast.
The supporting cast like Yoo Jinho, Jin-Woo's loyal friend and guild vice-master, provides a necessary human anchor. He represents the normal person's perspective in this insane world. The Japanese hunter Goto Ryuji serves as an early benchmark and antagonist. But let's be real, the story is a power fantasy vehicle for Jin-Woo. Everyone else exists to react to him, help him, or get beaten by him. If you're looking for deep ensemble dynamics, you might be disappointed. It's a spectacle, and the characters are pieces in that spectacle, which is fine if that's what you're there for.