Answer:
The celebrities of high school were part of this crowd.
I start in little but I end in full, you'll find me in half and complete.
They come in many varieties: Red, Black, Dead, and Caspian to name a few.
In your fire you hear me scream! Creaking and whining yet I am dead before you lay me in your hearth.
What grows when it eats, but dies when it drinks?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?