adjective / noun
central
SEN-trul/ˈsentrəl/
Situated at the middle or main focus.
The wheel's central hub joins the spokes at the middle.

Etymology
Centrum originally referred to the fixed point of a drafting compass, marking a circle’s middle. The idea of a center also extends to a focal point of power or importance.
In context
one of the central figures in this novel is um uh the goddess of the lake and we see how the goddess of the lake is very important