However, what you described sounds like a coping mechanism that some individuals might use during challenging times. People sometimes adopt a different persona or create imaginary characters in their minds as a way to distance themselves from difficult emotions or situations. This can be a form of escapism and a way to temporarily deal with stress or emotional pain.
Whether this behavior is helpful or harmful can depend on the context and how it impacts the individual's overall well-being. Temporary escapism can provide a brief respite from distress, but it may not address the underlying issues causing the difficulties.
If someone finds that this coping mechanism is causing problems or preventing them from addressing their emotions and challenges in a healthy way, it may be worth exploring other coping strategies or seeking support from friends, family, or a mental health professional. Sometimes, adopting healthier coping mechanisms can lead to more constructive ways of managing stress and life's challenges.