Edit: Oh right, I remember now. Needed some accent that is conducive to slurring/drawling words, since Ms. Assistant also does it often in the original. With considerable variation too; usually it gets very heavy when she becomes emotional, but otherwise it's light and sometimes imperceptible.
I could use the usual Southern American accent, but it didn't quite fit (her not using Kansai being part of the reason). Then I took a look at post #4521834 and decided, "Yep, she looks like a (Borderlands) bogan. So a bogan she will sound."