Description: Peter Petrelli, portrayed by Milo Ventimiglia, is a fictional character on the NBC science fiction drama series Heroes. He is a former hospice nurse in his mid-20s with the power to absorb and mimic the powers of other people with abilities. Sensitive and compassionate, the character was initially defined by his complex relationship with his older brother, Nathan. Since that time, Peter Petrelli has had to deal with the outcomes from the decisions that his abilities force him to make.