This will definitely include spoilers for V3 as well as most of the Hope's Peak Academy Saga.
Unlike Makoto, his title is more literal, as he experiences an extraordinary cycle of good and bad luck that ultimately works to his benefit when good or causes some sort of harm to him when bad.
At the end of the game, they are both revealed to be under the control of Alter Ego Junko, who had been manipulating Monaca Towa to further her own plans.
As the people around her begin to die and she has to clean up the mess, she wonders how far she can go before she reaches her breaking point.