"Interesting. To what extent do you suppose it's a learnable skill?"

There's that question, and the superset: to what extent is it a magickable skill? Presumably it could be done - but adding skills doesn't have negligible personality effects. Bella was pretty well suited to install perfect recall and cognitive speedup. She's not sure how well person-reading would graft. This is similar to why she hasn't made herself an Alice-style super-masochist.