Quote Originally Posted by geoduck View Post
This is total speculation on my part, but I bet it turns out that Lu hasn't done any improvements because she can't- except for Agatha, none of the bodies she's currently occupying are Sparks, and so she can't Spark out. (And of course Zola is probably one in charge with The Queen of the Dawn's body, so no improvements from her, either.)
Well, this is an interesting question, for two reasons. #1 is that the Baron was researching the location of the Spark in the brain. #2 is that Agatha was suspected of having created clanks that have the Spark.