10

10 is a friend of 21 and was an inhabitant of the Digitaza Hotel.

On the day of the Incident, he was called into the Number Recreation Room by 999. When the group was attacked by 209, 10 leapt at him and grabbed his gun. However, 209.1 grabbed the 1 off 10 and threw it out the window. 10's zero was then also thrown out by 209.2. He landed in the hotel pool, surviving the fall. He got out of the pool and lay on a deckchair, falling asleep.

When C7 was thrown out the window of the Digitaza Police Station, landing next to him, 10 went over to him. After C7 woke up, 10 suggested that they go to the hotel's hospital. A hotel ambulance then pulled up, and 330 told them to get in. When 331 told the two numbers to lie on stretchers, 10 was unsure and tried to open the door. 330 told him he could not leave. 10 noticed an anaesthetic injection on a table and grabbed it, stabbing it into 331. He then leapt at 330, causing the ambulance to crash and 330 to fly through the front window. He escaped the wreck of the ambulance. Unknown to him, 332, who had been hiding inside the ambulance, crept up behind him.