What are the most significant events in Barbery's The Elegance of the Hedgehog?

The
first most significant event in The Elegance of a Hedgehog (representing
Rene's hidden elegance) is when Mr. Ozu moves into the apartment building of which Rene is the
concierge. Mr. Ozu is a catalyst for the further development of the story. He sees through both
Rene and Paloma and realizes they are more than they let themselves appear to be. He encourages
both to expand the revelations of their true identities, for example, he gives Rene
Anna Karenina and he prompts Paloma to reveal her fluency in Japanese.
After his influence, Rene and Paloma discover each...