Put it at the very start of the reveal, just before the character is fully on screen, then follow it with a Vine Boom Sound Effect as the image lands and an Anime Wow Sound Effect for the reaction shot, keeping the entrance as the focus.
About this sound
This is a very short, roughly one-and-a-half-second dramatic sting built for a sudden reveal, with a sharp, punchy hit that lands the instant a character appears. It feels cold, intense and deliberately over-the-top, turning an ordinary entrance into a moment that reads as powerful, stylish and funny at the same time.