"No apologizes needed." Again, swift, for she feels this is correct. It's just what she likes to be called, in deference to being called anything else. (Ma'am would have earned her room mate a funny look though).

"That isn't me. I either do it, or I don't." Honest to the core. "Otherwise, I would be wasting my time, and others." She'll find out soon that she's speaking to a workaholic, somehow.