Mixed valency is a well-known phenomenon in which charge distributions can change via intervalence charge transfer. In addition, there are many other ubiquitous phenomena for charges such as proton transfer, zwitterionization, charge separation, and some supramolecular interactions. However, a basic understanding of the interface between mixed valency and other charge-involved phenomena remains poor. Recent progress is described in creating mixed-valence subspecies by introducing stimuli-responsiveness to conventional mixed-valence frameworks and interplay between mobile charges and charges introduced via light and ions.