These people are all competitive egomaniacs.
Pesci is also seen to be able to measure the weight of a person he has hooked.
Later, upon being moved by Prosciutto's determination, notably still powering his Stand when crushed between the wheels of the train they are on, Pesci gains the confidence and ruthlessness necessary to make himself a serious threat to the whole group and nearly kills during their battle.
He is a User and uses his to great effects.
The coaches assigned their teammates before first Head of Household competition.
Pesci is also initially shown to be very unconfident in his abilities and his intuition, something his superior, Prosciutto, points out and is seen cheering him on.