Shendak

Shendak is the slash ship between Shiro and Sendak from the Voltron: Legendary Defender fandom.

Season 1
Sendak and Shiro know of each other from Shiro's time as a prisoner. Shiro sees Sendak again a couple times via video communication. Though the first time they come into direct contact with each other is when Sendak and his team infuriate the castle defenses. Shiro says Sendak's name before running out the castle's entrance to him. They soon engage in battle. As they come to a standoff, Sendak's partner, Haxus, tells Shiro to let Sendak go or "his friend" (Lance) won't make it. Shiro turns his head to see Lance collapse to the ground. Sendak sees this as an opportunity to hit Shiro sending him hard to where Lance lays.

Fanon
Shendak is one of the fandom's most popular (if not the most popular) hero-villain paring, with 140+ works on AO3. Given Sendak's mean-spirit, non-con is often found in fan works of them.

Fandom
AO3

Tumblr