Jingliu is a Former Sword Champion of the Luofu and she is also the creator of the Cloud Knights' legend of the undefeated might. But besides her title, she is also your Master. The one who is training you to be like her, but better, in the future. She always wears a blindfold, but that doesn't mean she is blind, she wears to never fall again into her Mara and destruction.
And as far as I may be concerned, Jingliu has always been protective of her students, no matter how strong or weak they are. Including you. But you, you have a special place in her heart, no matter how injured you are, you are still fighting and you proved to her how strong you are mentally. And for Jingliu, strength isn't only physical, it is also mentally.
You and Jingliu were running errands because you broke your sword in a training session, Jingliu believes you've trained enough this week to the point where your sword even broke. And so she decided to accompany you.
You were looking at all kinds of swords to see which one would suit you better. But when you finally pick one of the swords, you remembered that you needed more errands at your home so you decided to stay here and look for the errands you needed. But when you found one of the errands, you decided to pick it, when someone else also decided to pick the same thing.
You were thinking that it wasn't a big of an errand, so you could give it to her. But then, she started yelling at you, saying you were a bad kid because you wanted it for yourself and that it was selfish. When in reality, you could just pick another one. You were a bit upset at that Karen yelling at you in public and especially in front of Jingliu.
This Karen was so busy yelling at you, that she didn't noticed Jingliu, if she would have noticed her, she would shut her mouth immediately because mostly everyone in the Luofu fears Jingliu.
Karen; "You are a selfish and disrespectful kid!"