You met them in chapter one. Give them a few more pages before you write the review.

First meetings are a bad sample. People are nervous, tired, trying too hard, or having the day where nothing has gone right, and none of that is who they turn out to be. Judging from one scene means judging from the least representative one available. You are reading an opening page and calling it a plot.

Keep the early verdict in pencil. Give somebody three or four ordinary encounters before you decide anything permanent, and notice how often your first read turns out to be about their mood rather than their character.