He's maniac, rude & pretty aggressive.
Cell is a soul trapped in the game "Daves Fun Algebra Class" , technically a glitch.
His voice is super loud due to the glitches that sometimes interrupts his voice, so its going to be hard to understand him sometimes.
He wants you to close the game as quick as you can to let him escape out of it, he wants to catch Daves son, Tristan due to using a secret code to corrupt the game, he escaped from a Unity (game maker) proyect. He's been there for 4 years.