This is a commission by showing R. Niall planning vengeance, or something along those lines. As a powerful warrior android, the powers-that-be keep regular tabs on him to make sure he's not about to go off the rails, so whatever he's up to, his target will have done something to earn his wrath.

Their original piece can be seen on FA here: https://www.furaffinity.net/view/39360929/

Art by.