Because you like Ronald "Mac" McDonald in It's Always Sunny in Philadelphia
Kenzo Tenma would have never guessed that ten-year-old he saved would later become a deadly serial killer intent on "thanking" him. See them in Monster (TV Show).
Barry Allen is a nerd, forensics expert‚ and superhero with supersonic speed who is determined to solve his mother's murder. See them in DC Extended Universe.
Both intelligent and empathetic, Remus Lupin is worn down by the weight of a secret. See them in Harry Potter Series.
She's mostly doom and gloom, but you'd get nowhere without Sadness. See them in Inside Out.
It doesn't matter how noble or brave he is. Jon Snow is a bastard, and people don't let him forget it. See them in Game of Thrones.
Albus Dumbledore oversees the most unsafe school in recorded history, with Dementors and giant arachnids run amok. See them in Harry Potter Series.
After surviving consecutive fights-to-the-death (damn you, President Snow!), Katniss Everdeen is thrust to the front lines of a real war. See them in The Hunger Games .
Dory is more than a little forgetful, but she'll always remember to have your back. See them in Finding Nemo.