Try the person who gave you your key ;)
Dude im in the level 22 of nairi but it's seems like i cant find the key or i cant enter Nairis room.
When i tried to talk with esther there's no option of getting a key
What should i do
have you repaired anything? there might be some check for repair stat because I always told Esther I need to repair Naira's computer. once you get in her room, look around, she has a spare key