Voir

Harry doesn't understand the meaning of the word 'no' when it comes to Fenne's personal life.
She's a disowned pureblood for becoming a muggle psychologist and is content with her books and quiet judgements-- she doesn't go looking for trouble, it just sort-of sits in her lap.

Now Harry wants her to follow him on an insane adventure all the way back to Tom Riddle's Hogwarts years and somehow resist the urge to profile the most famous psychopath of her lot.
Not bloody likely.