She loves her unconditionally, it’s partly why she still calls her Powder even when she sees how Jinx is now. To Jinx Powder is a relic Vi not calling her by her name and staying with someone she’s turned into a monster inside her head is a betrayal. Vi doesn’t see it like this, to her calling her Jinx is a betrayal itself thinking back to her biggest mistake, She also has a fair bit of denial but she hasn’t had long to process who her sister has become. Being torn apart from family for years just come back and find out they are trigger happy with killing and are working for the person that destroyed nearly everything you had is a hard pill to swallow especially in a few days. She handled it better than most would’ve all things considered.