5:07 - 5:18 here's a crazy thing: that's part of her combat animation set in-game. 5:30 they've got some kind of wizardry in the render engine that lets them do that effect in-combat, it's wild.
its a good mindless gacha game tbf, they just chose to make it more chill and less story based and focus more on characters and style which imo is a good idea with HSR and genshin and wuwa already being big story games or hardcore gameplay (sort of)