Prince Lotor (Voltron: Defender of the Universe)

Crown prince of Galra and a half-Altean. A dangerous and cunning adversary, his only weakness is the fact that he fell in love with Princess Fala, who somewhat resembles his mother whom his father, Emperor Daibazaal, killed after begging a favor to pardon the other prisoners but was refused. He plots to overthrow his own father and marry Princess Fala. He is a sly, scheming villain with a sense of honor, preferring to fight fair over his father's dirty tactics, and is Akira's frequent rival. Like his father, Sincline loses his temper easily and kills his own men with very little provocation. He even killed his own slave woman once when she accidentally spilled some liquid Sincline was drinking on his leg. In one last confrontation, after killing his own followers for siding with GoLion, he decides to take Ryou as a hostage. While attempting to destroy GoLion to avenge himself of his previous defeats and rule the universe, an enraged Ryou stabs him and they both fall to their deaths.