What term describes a person who is becoming aware or conscious of something?

The term that best describes a person who is becoming aware or conscious of something is "Perceiver." This term emphasizes the act of recognizing, becoming aware of, and interpreting sensory information or experiences. It highlights the process of perception where an individual not only sees or observes but actively engages with the information, leading to an understanding or awareness of their surroundings or a particular situation.

In contrast, while an "Observer" denotes someone who watches or monitors something, it does not inherently imply an active awareness or consciousness that comes with the term "Perceiver." The term "Interpreter" suggests a deeper level of analysis and understanding of information, often involving explanation or translation, which moves beyond just becoming aware. A "Witness" typically refers to a person who sees an event occur, especially in a legal context, but does not necessarily indicate a broader cognitive engagement with that information as one who is perceiving would. Thus, "Perceiver" most accurately captures the essence of becoming aware or conscious of stimuli or information.