The second opening of My Hero Academia S3 features three rapid-fire shots of a red-haired character wearing goggles and a very smug grin (YouTube reference):
These shots are placed right after the title card, implying he's going to be a significant character in the Provisional License Exam arc, but I don't recall him actually appearing at any point. I waited until the final episode came out to ask this, just in case he showed up towards the end of the season, but as far as I can tell, he still hasn't.
I check through the lists of MHA characters on both MyAnimeList and TV Tropes, and couldn't find him on either of them.
Who is this guy? And if he didn't appear, or appeared so briefly that I forgot about him, what's the significance of his appearance in the intro?