@gnusi
Just be yourself, but professional, respectful and prepare. Listen, listen, listen. Pay attention to the recruiters, listen to the presentation, follow directions well. Don't compare or care so much of what other people is doing or dressing. Do not bother with counting how much people are with you. None of that matter but you. It isn't competition. It is about who you are to present yourself to the recruiters. If they see the potential in you (AKA, if they like you), then you will be selected to the next stage of the recruitment process.
And good luck!