Because you like Princess Peach in Super Mario Bros.
Raiden is an efficient soldier haunted by his repressed past. See them in Metal Gear Series.
Jane Foster is an astrophysicist who suspects the colors in the sky may be a portal to another world. See them in Marvel Cinematic Universe.
Prideful and psychotic tendencies combine to make Dr. Eggman a dangerous and villain who will squash anyone in his path. See them in Sonic the Hedgehog.
All who live know his name, and all who oppose him shall know Death. See them in Darksiders Series.
Diana Prince is using a truth-telling lasso and super-strength to make Earth a little more like Paradise. See them in DC Extended Universe.
Jasmine dreams of something more than palace life, and she's not afraid to go get it. See them in Aladdin.
A fight every now and then makes Dante's life a little more interesting. See them in Devil May Cry.
An ambitious man of science, Norman Osborn has become green with envy over Spider-Man's powers. See them in Marvel Cinematic Universe.
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.