Fontana is the main antagonist throughout Cases 0-4 in Dead Rising 4.
She is head of the private military organization called Obscuris that was cloning humans and weaponizing the zombie parasite to sell to the highest bidder. After a while, they changed their mission into capturing and training zombies. The plan was to create workers for plantations and factories that would never die and would work for free.
She is a strict and no-nonsense woman who can be very impatient when it comes to producing results.
She bled out after she lost her arm from a grenade in an attempt to kill Calder.