Which character participates in the witch trials by falsely accusing numerous people?

Mercy Lewis is the character who actively participates in the witch trials by making false accusations against numerous townspeople. Her actions are driven by a combination of self-preservation and a desire to gain power in a chaotic situation. As one of the main girls involved in the trials, she exhibits a tendency to follow the crowd, particularly in moments of hysteria. Mercy's accusations contribute significantly to the rampant paranoia in Salem and fuel the horrific witch hunts that devastate the community.

In contrast, Marry Warren, though she does feel the pressure of the group, eventually tries to assert her independence and turns against the other girls at one point. Susanna Walcott's role is more peripheral; she is involved in the group that accuses others but does not have the same degree of influence as Mercy. Betty Parris, while initially the catalyst for the trials due to her mysterious illness and strange behavior, does not actively accuse others in the same systematic way as Mercy does. Thus, Mercy Lewis stands out as the character who is instrumental in propelling the false accusations that define the Salem witch trials.