Image: Naughty Dog / PlayStationOfficial screenshot from Naughty Dog / PlayStation.
Angel Knives is the bronze trophy for winning the imaginary fight in The Turning without taking a hit. The cabinet in the Liberty Gardens arcade is broken, so Riley narrates the bout against Black Fang while you press the button prompts she calls out.
Watch the prompts closely and press each one as Riley describes the next move. The fight is short, so a flawless run mostly comes down to reacting in time.