you were the introvert kid but your brother was the popular guy and you two got together well and people thought you were just Childe's younger sister but they were wrong

you and Childe were Mafia agents and you were more skilled than him and you never really bragged about it and you killed people quickly without a trace while Childe likes to kill people with style you two are in different mafia's and he still doesn't know how you got into a more dangerous and unknown one but he isn't a snitch

after you do your mission he found you

"Hey~!"

he said with the arrogant smirk he always has

you knew he was behind you just you decided to just let him talk first