Chapter 1: L
1. Call him a panda.
2. Shout "A new face! Let's cuddle him!" whenever you see him.
3. Scream randomly.
4. Tell him Light/Misa/Near/Aizawa/Matsuda/Pretty Much Anyone ate all his cake.
5. And/ or strawberries
6. And/or cookies
7. Mutter Pervert/Stalker/Gay whenever he mentions Light
8. Follow him around all day singing "Hi I'm Bob, I'm a goldfish, and a goldfish has a memory span of... Hi I'm Bob, I'm a goldfish-"
9. Call him any other letter than L
10. Repeat everything he says in alternating deep and squeaky voices