What term describes someone who travels quickly away from a pursuer?

The term that best describes someone who travels quickly away from a pursuer is "fleer." This term implies a sense of fleeing or escaping from danger, emphasizing the act of rapid movement to avoid being caught. In various contexts, "flee" is associated with urgency and a strong desire to evade, making it particularly fitting for situations where one is trying to escape from someone or something that poses a threat.

The other terms have different connotations. A "chaser" typically refers to someone who is pursuing an individual or object, not the one escaping. A "runner" can mean someone who is moving quickly, but it does not inherently denote an escape from a pursuer; it's a more general term that lacks the specific context of fleeing from danger. An "escapee" is someone who has already managed to break free from captivity or a restrictive situation. While escapee implies a successful escape, it doesn't convey the immediacy and speed currently being characterized in the question.

Thus, "fleer" is the most precise term for describing someone actively fleeing from a pursuer.