The pity system.

Seraphine will sooner or later get an exalted skin, that is a fact. What I'm wondering is, does the pity system reset when the gacha event ends ? I think it would be extremely unfair if it does reset, but I wouldn't be suprised because it is riot games after all. I tried to check if they communicated this specificity, but couldn't find it. If someone could enllighten us on the matter, I'd be grateful ! (Imagine releasing exalted coven Seraphine, and having to spend a fortune when you already spent that fortune to get nothing but ME, icons and emotes, I AM sobbing in advance).