The voice was good, it wasn't grading on the ears. Or sounded complexly off like some voice changers.
The lip sync was good and the expressions were funny.
Assuming that your talking about the character of Ashley Graves from that one hit video game where she slept with her brother [in a dream sequence], a bat. Since the hammer would be heaver and less fun to swing since you need to put more umph into it. But a bat can go fast and hard, especially metal ones. So yeah, a bat.
[I don't hit people with metal bats by the way]