Evil Siblings

"We share blood. But we are not brothers."

- Noob Saibot to Sub-Zero.

Bad Siblings are the type of villains who are related to the hero or heroine - brother or sister. And many stories bad siblings (most often older)  bully, threats, intimidate and abuse physically and mentally over good sibling considering him/her worse. This type can also include half-siblings, step-siblings, and adoptive siblings.

I other case, bad siblings (younger or older) can be jealous of a good sibling who is loved and praised by his/her family. For this purpose, he/she plans to get rid of good sibling, for example by killing him. On the one hand, bad siblings in the past were loved for good siblings, but a some tragic event may change him/her for the worse, blaming his/her own good siblings with a huge resentment.

Also Villain have own siblings, who helps in evil plans, but in other cases brother/sister of main villains serves as incompetent, bumbling and idiotic henchmen.

Literature

 * TBA

Animated

 * Scar (The Lion King)
 * Professor Screweyes (We're Back: A Dinosaur's Story)
 * Rameses (The Prince of Egypt)
 * Frankie (Shark Tale)
 * Hopper (A Bug's Life)
 * Teridax (Bionicle)

​Live-Action

 * Loki (Marvel)
 * Henry Evans (The Good Son)

Animated

 * Wayne Cramp (Cramp Twins)
 * Terrence (Foster's Home For Imaginary Friends)
 * Amy (Total Drama Series)
 * Azula (Avatar: The Last Airbender)
 * Brad Buttowski (Kick Buttowski: Suburban Daredevil)
 * Cree Lincoln (Kids Next Door)
 * Gort, Mort &﻿ Wart (Orson's Farm)

Live-Action

 * Flurious (Power Rangers Operation Overdrive)
 * Moltor (Power Rangers Operation Overdrive)

Internet

 * Jeff the Killer (Creepypasta)

Videogames

 * Vergil (Devil May Cry)
 * Noob Saibot (Mortal Kombat)
 * Big Brother (Five Nights At Freddy's 4)

Anime and Manga

 * Itachi Uchicha (Naruto)
 * Raditz (Drago Ball Z)