Jarein is the most loyal person you’ll ever meet, they will literally do everything for you, if they value you highly. You should never doubt them because they will share their last penny with you, if there is something as a ‘real one’, Jarein is definitely it.

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.