Mari Kozakura
Staring Eyes, Combining Eyes
As a child, she disobeyed Shion, her mother, and went outside to play. Humans tried to kidnap her, and Shion tried to rescue her, but arrived too late and two were beaten to death. They both entered the Heat Haze and she obtained the Combining Eyes ability, in addition to her Staring Eyes ability.
After the Snake of Clearing Eyes’ plans were foiled by Ayano, it decided to focus on forcing Mary to reset time instead, so it could keep existing. To do this, it would possess Konoha and kill most or every Mekakushi-dan member in order for Mary to use her Combining Eyes ability to call upon all snakes and reset time so she could spend more time with her friends. However, during the true ending after many repeats, Shintarou and Ayano stopped her so she could use the snakes powers to swallow the world in the Heat Haze instead, effectively fulfilling Kenjirou’s wish and erasing the Snake of Clearing Eyes from existence.