Malcolm is Jessica's kind, loyal neighbor, who occasionally grabs snacks from her apartment. Under Kilgrave's manipulation, he develops a drug addiction and starts spying on Jessica. Kilgrave's plan doesn't last for very long since Jessica helps her neighbor get clean. Malcolm, in turn, helps her with various housekeeping tasks in her business, like, you know, dumping a body.
We see Malcolm again in The Defenders. He helps Jessica find John Raymond, who later takes Malcolm as a hostage. By the end of The Defenders, Malcolm helps Jessica relaunch Alias Investigations. Growing up in a family committed to community service, he is devoted to helping others and seeks to right the wrongs he committed under Kilgrave's control.