Some have wondered what the first letter was.  
It was "A Silent Shadow", another suicide note
written in character by someone else.  

Now, who wants to write Asuza Shiratori's suicide note?  

"Death is so kawaii!"

Dr Tofu's suicide note

"Death is the cure for what ails you!"

Kasumi's suicide note

"I'm going to teach Akane to cook if it kills me!"

Ryouga's suicide note

"Having a wonderful time, wish I knew where!"

No, please, if you have more suicide note oneliners, don't 
write them in separate messages, just add them to the end of 
something more substantive like a review or a fiction.  Do not
compound my sin.