Rito is trolling with these interactions...
With Kai'sa interaction video released, she has a line towards jinx ; "settle down sister!" now i know it can be seen as just slang and they could have no relationship with each other what so ever,
but why even put that interaction in then ? from a world perspective Jinx and Kai'sa will probably never meet each other in any point of there lives... Same goes for swain's taunt to Jinx "faces fading in the flames... It was all her fault " these characters will probably never meet.
unless... Riot is planning something including Jinx in the future regarding lore, and they are planting these hint so that they have a story to work with later on. Who knows Kai'sa might actually be Jinx's sister :P . anyway this is just my 10 cents...Feel free to tell me what you think !
[sg-ahri-2]