Lawliet

L. Lawliet, also commonly referred to as Ryūzaki, is the main antagonist of the Death Note franchise. He's a genius enigmatic private detective, and is stated to be the best detective in the world. He later takes on the case of capturing the mass-murdering serial killer, Kira, resulting in a classic battle of wits between him and Light Yagami, who L rightfully suspects is Kira. Due to being the main antagonist, he has appeared in multiple forms: 
*L Lawliet (Death Note)
*L Lawliet (Death Note 2017)
*L Lawliet (film series)