There's an official Touhou popularity poll running until September 30th: https://toho-vote.info/
You get 7 votes. First entry gets double votes. If you have a slot to spare, then please consider Orin, the cheerful ginger hellcat. 火焔猫 燐
She has lovely stage and boss themes.
https://yewtu.be/watch?v=iQZ4_NK42CY&listen=1
https://yewtu.be/watch?v=t0L8h2NfnzE&listen=1
An English voting guide is available here: https://maribelhearn.com/thvote/guide
Ignore the Google, Twitter buttons, you can sign up with an e-mail.
Results for the previous years can be seen here if you want to check: https://maribelhearn.com/thvote