How would a psychopath like Jhin who kills random women and men just for the sake of beautifying their deaths be taken when he is laning with lets say, Leona, who is supping him, wouldn't she think that he is a serial killer and not team up ?
Well technically the in game is when the champs are being controlled by the summoner(you).
Well shit, when five people/things are trying to kill me, i take all the help i can get.
The things in game are no canon in the lore. Jhin and Leona will never meet each other.
has been around for a while and nobody wonders why a serial killer jester clown is murdering for the hell of it. Outside stuff doesn't really matter when there are no factions inside the arena, where 
and 
can fight 
and 
