The cheerleader role is really whatever you want it to be. Some people want someone to bounce ideas off of or talk plot with and some people are just looking for someone to stand behind them and cheer them along ever so often. It would really just depend on what you were comfortable with.

If you have a read through the cheerleader sign-ups so far, it might give you a better idea =)

Here's the link if it helps to read through: Cheerleader sign-ups