What animal is shadow?

"Shadow" isn't a specific animal, but rather a term that describes the absence of light. It's a phenomenon caused by objects blocking light, creating a darker area behind them.

However, the term "shadow" is sometimes used figuratively to describe something that follows closely behind another thing, like a loyal companion. In this sense, "shadow" can be associated with any animal, but most commonly with dogs due to their close association with humans.

If you're thinking of a specific story or context where "Shadow" is an animal, please provide more details, and I can help you figure out what animal it might be!