Ekko lore

So, we know that Ekko used to know Jinx and Vi, and that jinx wasn't always insane. So, I came up with a potential explanation. They were in the gang that is in Vi's lore together, and then the "incident" with Vi happened. Jinx (who I'm assuming is Vi's Sister) started to go insane, and then used the time device that Ekko was given to try to sort of retcon Vi's dissapearance. However, she teleported too far back and ended up as a child. Ekko reversed the time travel, but jinx was stuc with the mind of a child and an obsession withguns. She left for piltover, and now Ekko is left alone in Zaun to do whatever timey-wimey vigilante stuff he wants.