Classic hero/ine or antihero/ine
Heroes are easy; I remember them. There are many, but one of my favorite heroes is Rikki-Tikki-Tavi from Rudyard Kipling’s The Jungle Book.
Villains are harder; I tend to forget them. But here is one antihero I haven’t forgotten – Milady from Alexandre Dumas’s The Three Musketeers.