Edward Jacob Cullen is the biological, hybrid son of Edward & Bella Cullen. Ej is considered to be their “miracle”, because of what it took to keep he & his mother alive through the pregnancy. He has the abilities to show people his thoughts by touching them and presumably break through their mental defenses. Irina of the Denali Coven sees EJ and believes he is an immortal child, a human child who had been turned by a vampire. She informs the Volturi, as immortal children are not permitted to live. The Volturi reach Forks intent on killing EJ and the Cullens. However, the Cullen family members gather witnesses from around the world to prove that EJ is not an immortal child. Alice brings another vampire-human hybrid, Nahuel, who explains that they pose no danger to the vampires. Convinced that EJ is not a threat, the Volturi leave, and EJ and his family are left in peace. EJ is described as kind, overwhelmingly intelligent, and fun-loving. He has a competitive streak that prompts him to accept Jacob’s hunting challenges, which keeps him motivated to drink animal blood. EJ is fascinated by everyone in his surroundings, despite their being different species. He mostly prefers not to speak out loud and instead use his power to communicate with others, because he finds words insufficient to describe his feelings. However, he will talk if he has to or if he is unable to touch someone. He is also depicted as a brave and headstrong character.
Plots with EJ can be found here.