it is not one idividual but the host of the group that have skills that they can all share to better the group as a whole. 

I am adding a section to each one of the main charaters with a list of skills that this person brings to the group of sensates. this I think will allow one to understand how they can work together to overcome the fight that each one has to face, for the group as a whole or each ones personal problems that they look to overcome.