(Time skip later in the post.)
"This is my best bet. She has no mugshot, or information. And where exactly did she transfer from? when I take attendance, I'll make the excuse tomorrow morning to call her name first because she's a new student. If she has a different name and no lifespan, she's the diary holder I've theorized about." Light said. "Now, to get to work on forging my credentials." Light said. Light had little trouble pulling resources from the web, as there was a Light Yagami that he decided to steal the life from, that lived a similar life as him. Perhaps it was his counterpart on this Earth, lucky for him. He had gone missing, lucky for him, and had all of Light's credentials as a superb student. After a few hours, Light was the new student teacher of the three diary holder's classroom. After that, he had no trouble hacking into the police and FBI databases, and spent most of the night writing down names. Exactly 400 of some of the world's worst criminals had been killed off alone during that night, which would be sure to spark international media and police attention. Hopefully, the kids in his class would talk about it. Light had wiped all trace of access from the computer, so no one would know. Light had also gotten a few hours sleep, so he wouldn't appear tired. Now morning, Ryuk and Light boredly waited at there new desk for the students to come in. They had exactly ten minutes left to themselves. "I killed 400 criminals last night while you were off. That's sure to get everyone's attention." Light told Ryuk. The Death Note was on his desk, but hidden by papers and books so no one would see it.