Only a fool would believe that they could waltz in and leave unscathed after provoking Lillie Bai.
When Ethan removed his mask and came back to the company, he was given a confused and concerned look from Ming Lian.
Why?
Well, he does not have time to cover the eye-catchy bruise from the side of his lips.
Ethan felt terribly wronged.
Before parting to continue their work at the company, he gave her Ai's flash drive so that she could connect her to the company's network operating system.
Because of this, Ai became Lillie's spy to her own employees. She would give her reports if there are any suspicious actions committed. Like sending confidential information to outsiders, shady transactions from the company's bank accounts and hacking through the company's main frame.
Looking out for rogue employees was already implemented. It was made easier and faster because of Ai.
'Knock knock'
[1] Demons - the name they call the people belonging to the Underworld.