What is Bellas power?

Answer 1

When Bella becomes a vampire, she is a "shield", as it is categorized by the Volturi. This means that she is immune to all mental powers that are possessed by other immortals. She can also push the shield out to include those around her, and she can or push it away from her. This is only ever used when she wanted Edward to hear her thoughts. When the others around her are not in the shield, they cannot see her or anyone else in the shield.

Answer 2

Bella has a shield where the more angrier she gets the more her shield spreads. The shield protects her from any immortal thing/person, from using their powers on her. If Bella became a vampire, she would be the most powerful one in the world..

Answer 3

She's a shield she can shield herself from other vampires powers and she can expand her power and shield others lol