Inspired by this image from a game called Legend of the Cryptids, I really wanted to develop some form of class that controls enemies like marionettes with tendrils of arcane energy. The struggle became when decided which class to make it a subclass of, since I always feel 5e is lacking in regards to class options (as more sub classes are released, this became less of a problem). I settled on the Warlock, feeling this would compliment a not-so-good-aligned warlock of any level.
The Arcane Puppeteer specializes in subjecting its victims to obey the warlock against their will. Higher levels will allow more than one puppet to be controlled at once (though it will never exceed 2, unlike the inspiration picture).