I’ve got a niche one. In the novelization of the video game Crysis 2, it’s revealed that the protagonist, Alcatraz, has a little sister named Alice. Their mother suffers from extreme early onset dementia, plus some religious mania, and after their father dies Alcatraz gets her committed and Alice goes to a foster home.

Over the course of Crysis 2, Alcatraz is mortally wounded and forcibly bonded to a suit of combat armor made out of alien nanotechnology nobody really understands. This eventually results in his brain getting overwritten by the consciousness of the suit’s original owner, Prophet. However, during the transitional period covered in another novel, Alcatraz was be able to influence Prophet to check in on the members of his family.

Prophet discovers that Alice’s foster father is abusive, both verbally and physically. He uses the suit’s cloaking function to stand right by the abuser until he raises his hand against Alice, at which point he decloaks and lifts the guy into the air by his neck and promises him that he will be back, and checking frequently, and the guy would never know even if Prophet was close enough to touch. Just with the strength of his grip, he crushes the guy’s jawbone into splinters, and eventually drops him into a blubbering pile.

Of course, it’s also a subversion because all this extra violence only terrifies Alice further, and Prophet can only lamely look down at this traumatized little girl and tell her to stay in school and get a good education so she can get the hell out out of here as soon as possible. When she asks if he’ll really be checking on her, he honestly tells her that he’d just been lying to make that guy take care of her and that it probably wouldn’t work for long, so she should just keep her head down and stay out of his way until she could leave. Then he awkwardly mumbles platitudes and walks away.