  We discuss coexistence/mixing of different natures of hadronic composite
(molecule) and elementary (quark-intrinsic) ones in hadron resonances. The
discussions here are based on our previous publications on the origin of hadron
resonances \cite{Hyodo:2008xr}, exotic $\bar D$ meson-nucleons as hadronic
composites containing one anti-heavy quark \cite{Yamaguchi:2011xb}, and the
study of $a_1$ as a typical example to show explicitly the mixing of the two
different natures \cite{Nagahiro:2011jn}. In all cases, interactions are
derived from the chiral dynamics of the light flavor sector. These interactions
generate in various cases hadronic composite/molecule states, serving varieties
of structure beyond the conventional quark model.
