Honkai Star Rail's new banner has one of its strongest characters, and I'm not talking about Jing Yuan

gamesradar.com:

For the first time, one of the best characters in Honkai Star Rail will appear on a limited-time rate-up banner starting tonight, May 17, and no, I'm not talking about Jing Yuan, much as I expect him to fly up the Honkai Star Rail tier list. I'm talking about Tingyun, who's already one of the strongest support characters you can possibly have. 

Jing Yuan is easy to explain: he's a big five-star guy who does big AoE damage with his big lightning friend. The four-star Tingyun is a little more unassuming, but she's extraordinarily powerful. Her skill provides a three-turn damage buff to one ally, and her ultimate can give an ally a bigger damage bonus plus 50 energy to put toward their own ultimate. On top of that, because her skill adds extra damage to her own hits based on the attack value of the ally she's buffed, she does relevant normal attack damage despite being a four-star Harmony character. 

Swirl of Heavenly Spear Event Warp■ Event Duration2023/05/17 18:00:00 - 2023/06/06 14:59:00(server time)During the event, the drop rate of the limited 5-star character Jing Yuan (The Erudition: Lightning) will be boosted.Learn More: https://t.co/2rqr2Wb5Uo#HonkaiStarRail pic.twitter.com/6fjeDXMXBYMay 16, 2023

Tingyun uses very few skill points and can instantly refund about half of anyone else's ultimate, adding invaluable flexibility to basically any team. You can use her to double down on DPS ultimates like Seele and Jing Yuan's, reinforce your defense with someone like Gepard, or cheat out extra healing with Bailu or Natasha. Tingyun has her own buffing benefits built-in and she's essentially duplicating half of the other three ultimates in your team. I'm no mathematician, but 2.5 ultimates in one character sounds like a