Escaflowne is another title. I've seen some of the movie and anime, didn't make it far into either. The anime just got repetitive with no real development. What I know about the anime is pretty much spoiler. One of the main protagonists, Allan, he had his little sister kidnapped and he also fathered a son with a queen. The queen never told her husband that their son wasn't his and pretty much the kid ended up inheriting the king's kingdom.
Allan's sister was revealed as the antagonist, apparently she got kidnapped, experimented on, and brainwashed. The sister became a boy named Dilandau and he is pretty much the 1990's version of Malfoy because he is pretty much bloodthirsty and always sending his goons to destroy cities and people. He mistreats his goons, but because they are his loyal followers they bend over backwards when his life is under attack. Dilandau Albatou | Visions of Escaflowne | FANDOM powered by Wikia
I talked to someone about years back about Dilandau, she compared him to Malfoy due to how bloodthirsty and tyrannical he is. I told him that he was actually the long lost sister of Allan, which would probably send a lot of people falling out of their seats since it is an unexpected plot twist.