Whats the relationship between the characters and plot as seen in Sophocles' Oedipus Rex?

In
writing ,closely intertwined all elements of the drama with each other to
produce a coherent whole. Some plays are character driven, others are driven by plot; in
Rex the two go together, serving the drama's overriding needs. The plot of
the play is intimately related to Oedipus's , his overweening pride. This
pride is progressively revealed as the plot develops; it almost comes to take on a life of its
own, so much so that Oedipus's pride effectively is the plot for much of
the play. The pride is always there, in one form or another; what changes is how it manifests
itself and what the consequences are for plot development. Sophocles's purpose in writing
Oedipus Rex is didactic, that is to say he wants to teach and instruct. He
is keen to present the dangers of hubris, and as such
it's absolutely imperative for him that Oedipus's pride is integral to the plot, to the events
that unfold on stage.