This achievement eluded me for a long time and I finally got it! With Itto, who sacrificed like 50% of his HP to pull off the winning stunt. :D
I am back to the character building grind, well, now I am putting effort into it. I am very close to triple-crowning Ayaka! My next goal is to triple-crown Yae, then get both Kokomi and Yelan to 9/9/9 and also upgrade Kokomi's weapon to lvl 90. In-between that I am raising Qiqi and Mona. Sometimes it's hard to stick to one character because of resin limits and the way the talent domains rotate, but I am trying to stick to one goal at a time. If only to give myself a purpose in the game.
I will also need to artifact hunt... let's hope I don't get distracted by yet another new character! I am always lacking fodder for upgrading existing artifacts. AND artifact grind is the true endgame challenge for anyone playing Genshin.
I really like how sassy Yelan is. I guess that's just my type, the same way I really like Yae Miko, even if she's a bit of a mischievous bully at times.