That's a good question! The boundary between character and action is famously blurry.
We can describe characters in terms of traits—tall, short, clean, stinky, young, old—but this is only part of the picture. When we think about people, we think of them in many dimensions, and the most important dimensions are often what they do: how they treat people, what they spend their time on, how they react to different things.
So action and character are intertwined.