1. John Proctor: Abigail has a manipulative and controlling influence over John Proctor, with whom she had an illicit affair in the past. She threatens to expose their affair and accuse him of witchcraft if he does not comply with her wishes.
2. Reverend Parris: Abigail is aware of Reverend Parris's secret desire for Abigail and she exploits his vulnerability to manipulate him. She uses her influence to manipulate him into believing that she is a victim of witchcraft and that certain innocent individuals are practicing dark arts.
3. Mary Warren: Mary Warren, one of Abigail's friends and followers, is under Abigail's sway. Abigail exerts control over Mary, coercing her into participating in the accusations and falsifying evidence against innocent individuals.
4. The Other Girls: Abigail leads a group of young women who blindly follow her accusations. These girls are easily swayed by Abigail's words and are manipulated into believing and supporting her claims of witchcraft.
By using manipulation, deceit, and emotional coercion, Abigail Williams holds significant power over various characters in Act One of "The Crucible." Her influence sets in motion the events leading to the tragic witch trials that engulf Salem.