A girl that smiles a lot, but actually a mysterious girl. She is a good listener, she keeps her secret stay secret. An intelligent introvert. She knows how to manage things to keep clear, open-minded. But sometimes, she listened too much to other's critics about her. So, she isn't THAT CONFIDENT. She'll be a great bestfriend. She is purely kind and loyal.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.