Yao Guang

Aha has its own turn on the action order. On Aha's turn, every Elation character on the team uses their Elation Skill one after another, without spending any resources. The amount of Punchline the team has built up (it is shared) decides how hard this turn hits. After that, the Punchline is passed on to each character and they enter the Certified Banger state. Elation DMG ignores regular DMG Boosts and scales with the Elation stat instead, which is why Yao Guang's Elation buff is so valuable.

Her Skill deploys a Zone that lasts 3 turns, and while it is up, the whole team gains Elation based on Yao Guang's Elation. After she uses her Basic ATK or Skill, she gains 3 Punchline. If you use her Technique on the map, she triggers her Skill automatically at the start of battle without spending a Skill Point, so the Zone is up from the very start.

Her Ultimate costs 180 Energy. In return she gains 5 Punchline, Aha immediately gets 1 extra turn that counts a fixed 20 Punchline and does not consume the Punchline you have stored, and the whole team gets All-Type RES PEN for 3 turns. Don't fire it off right away, wait until your teammates have their buffs up. Her Basic ATK always restores 30 Energy, so it is a fairly steady way to charge her Ultimate.

While Yao Guang holds Certified Banger, every time an ally attacks, it triggers Great Boon, dealing 1 extra instance of Elation DMG to a random target hit by that attack. If the attack consumes Skill Points, Great Boon triggers 1 more time. If the attacker's Elation is lower than Yao Guang's, this hit uses her Elation instead. Her Elation Skill makes all enemies take 16% more DMG for 3 turns, and thanks to Poised and Sated, each use also recovers 1 Skill Point for the team.