While you’re there, don’t forget to vote for Prom Royalty and Prom Jester! The voting box is in the auditorium and you can cast your vote for who you want to see win in each category. Unfortunately, you cannot vote for yourself but thanks to our writer, ThatSimsLady, looking at the tuning files for us, we found out that you can increase your odds of winning with high Comedy, Mischief, or Charisma skills. To be in the running for Prom Royalty, you need to have at least level 3 Charisma skill. Higher Charisma skill increases the odds further. To be in the running for Prom Jester, you need at least level 3 Comedy or Mischief skill. Higher Comedy or Mischief skill increases those odds.
https://simscommunity.info/2022/08/12/attending-prom-in-the-sims-4-high-school-years/