Istas will be infiltrating as Maria's mother, a widower who has always sure to follow all of the Goodly Teachings, even the contradictory ones. However, deep down she has a lot of pent up inner rage, and a secret desire to wear things that aren't just practical, but pretty. The end result is that Istas can be rather fervent in the Judging Of Sinners, because all of that inner desire for carnage rage has gotta go somewhere.