Esmay

Esmay Diaz (also known by her alias "E") is a black-market dealer in New York City who assists Division Agent Simon Keyes in protecting the local ISAC data node. She only appears in the Operation ISAC YouTube videos as the deuteragonist.

Biography
Esmay was the daughter of Sofia Diaz, a receptionist at a shipping and receiving company. She didn't always get along with her and had a sister named Alex, who was a student before the outbreak. After the Green Poison epidemic hit New York City, her mom started dying, and she tried to be there at her deathbed, however she was prevented by First Wave Division agents.

When she finally reached Sofia, she was dead and Alex had mysteriously disappeared. Esmay became a black-market merchant who dealt in high-tech hardware and information at an unspecified point of time after the plague ravaged the city.

ISAC node caretaker Simon Keyes first contacts Esmay after the Last Man Battalion gains the SHD-XT47, a supercomputer that can reveal the node's location. She agrees to sell him high-tech anti-tracking hardware in exchange for a Smartwatch and some pieces of fabric.

While making the deal she is however ambushed but is rescued by Strategic Homeland Division (SHD) agents. After Simon holds up his end of the bargain, she is able to find out with the help of the smartwatch that Alex went out looking for her while Sofia was dying.

She also agrees to help Simon find "Asher" who is trying to take over the ISAC node in return for retrieving a batch of documents from the train yards guarded by the Rikers. She later informs them that a person who has had dealings with Asher is willing to exchange information in return for clearing his neighborhood.

After she is injured in an ambush, Simon brings her to the node's base where she recuperates. Agent Rainer agrees to find Alex who was hiding in the Underground tunnels and eventually rescues her, but unbeknownst to her, he is "Asher".

Esmay tries to get out of New York along with Alex using a Joint Task Force helicopter, but Rainer uses Alex as bait to kidnap her and force her to take her to the node's location, while wiping out the names of her and Alex from the evacuation list.

At the node base, he threatens to kill Esmay if Simon doesn't give him access into the node, but she is able to escape after a melee between him and Simon. She hides out in the base itself while Rainer goes looking for her and saves Simon from bleeding to death.