Finn was a tall and muscular young man of Ionia descent with olive skin, teal eyes, and straight black hair that was fashioned in an undercut that fell to his right side. His skin was extensively decorated with intricate black tattoos, most notably the word "kill" written in gothic calligraphy across his chest. He also had an ostentatious, gold-colored prosthetic jaw and was almost always seen wearing a bright yellow overcoat draped over his shoulders.

Silco is a callous and brutal yet highly intelligent and cautious man who will do anything to achieve his goals. He believes that the base violence is the only way to stand against Piltover and unite the Underground, and that power only comes to those who will forsake their own morals to achieve it. He is not afraid of having anyone who gets in his way killed. His ultimate goal is to have the Undercity stand independent from The Topsiders control and allowing it to be self-sufficient, newly formed nation of Zaun.