Blood-Ridden Keycard

Description
The Blood-Ridden Keycard is an item that is obtained within Sector-II hidden within a Glowing Storage Crate. It allows the player to unlock the door to Room-7 within Sector-VIII, where The Yandere optional boss battle is located.

Backstory
The backstory behind this bloodied keycard is that there was a struggle between EX-04 and a fleeing Scientist. The two of them got into an altercation that eventually lead to EX-04 killing the Scientist with a knife they had picked up somewhere within Sector-II, this is the reason why the keycard is so bloodied. However, the reason why it was discovered withhin a Glowing Storage Crate is unknown, but one can theorize that EX-04 had originally intended to use the keycard to gain access to Room-7 for unexplained reasons.

It is also believed that EX-04 was infected and was looking for some sort of cure that could be found within R-7, however it is believed that before they could find said "cure," the infection took over their mind and body and that someone took the keycard from them while the infection was taking hold. Thus, explaining why The Yandere can be found locked within R-7 and the keycard was found somewhere else entirely.