How is my character vocally ?

I naturally can be quite loud, Alice doesn't have a distinct accent (not that I know of) and I don't find it difficult with my volume or projecting to the audience, but find it difficult projecting my voice into other characters. Without even noticing I can sometimes devoice and make my character weaker and have less status, although Alice is only an assistant and Mark her boss has more authority and control than her, Alice has a lot of sass and can be quite informal about her attitude even though she is working for him and not vice versa. Once Will had told us to find the bad in our character as no one is "nice" in the play this helped me become a bit more empowered with my character vocally and found strength in what she is saying and how she is saying it. Although vocally I think I'm alright I need to work on my awkward body language.