Lately, I've been talking a lot about flat-arc (also known as "steadfast") characters, but these are not to be confused with flat characters. A flat character is a simple, two-dimensional character. In contrast, a round character is a complex, three-dimensional character.
"Flat" and "round" are not technically, strictly tied to character arc--though there are some common combinations. For example, a flat character is more likely to be a flat-arc character. Today, let's define each character type in depth and explain how and when to use which. At the end, I'll relate it to character arcs.
