Another theme is the challenges they face as a couple or friends. It could be external factors such as dealing with other characters who might not approve of their relationship, or internal struggles like personal insecurities that they have to overcome in order to be together or maintain their friendship.
One popular theme is their relationship development. Fans like to explore how they first met, the early stages of their friendship, and how it might have gradually turned into something more romantic.
Adventure themes are also quite common. Writers might put Nicole and Waverly in various fictional scenarios, like solving mysteries together in a supernatural world or going on a quest. This allows for exciting storylines and showcases their characters' strengths and how they work together as a team.