Kroeith

Kroeith is the familyship ship between Krolia and Keith from the Voltron: Legendary Defender fandom.

Season 5
BLOODLINES

Kolivan informs Keith they need to extract a Blade agent and destroy a super weapon created by Galra forces; which Keith will do on his own. He then shows Keith a surveillance image of the Blade agent – Krolia. Soon Keith leaves for her, making his way through a battle field. He infiltrates the ship she’s on. Keith makes visual of her, Krolia stops in her tacks, turning in Keith’s direction. Keith quickly hides back behind his corner. Moments later, she turns back and continues forward. Keith does to, only for Krolia to hold hold her gun to Keith’s head and Keith hold his blade to her neck. Keith says her name, then Krolia takes notice of Keith’s blade, she lowers her gun and tells Keith he’s late and that they don’t have much time.

Once inside, Krolia asks why Kolivan risked sending Keith in now. Keith tells her because it’s Ranveig’s super weapon. Moments later, the first layer of defense is breached. Krolia tells Keith they need to run, they make it to an elevator. Once exiting, they’re attacked by droids; they’re able to hold them off for a bit before Keith is taken down by Trugg. Krolia slowly stands and disarms her sword back into a knife. Keith watches on with a bewildered expression. She then holds up her hands and says to Trugg, “We can make a deal.” Keith then yells at her, “What are you doing!” Krolia turns he attention to Keith, saying, “I left you once; I’ll never leave you again.”

They make for a battle cruiser, once inside Keith is angry at Krolia for saving him; for jeopardizing the mission. Krolia turns to Keith and tells him to “shut up and trust me.” Following the deal she made earlier with Trugg - she gives Trugg the passcode for the super weapon. Once the code is confirmed, she and Keith fly off. Trugg orders a lackey to shoot them down. Keith flies them far away enough that they’re no longer being fired at. Keith goes up to Krolia, she gives Keith his knife back. Keith asks how she was able to use it – she then drops a bombshell on him; it used to be her, before she gave it to Keith’s father. Keith goes wide eyed, before saying, “You’re my –?”

Season 6
RAZOR'S EDGE

The episode starts right where “Bloodlines” left off, with Keith finishing his ''“You’re my mom? How? How did you get to Earth? How- how did you meet my dad? How- how are you so sure?”'' Krolia says she's sure and goes on saying how this isn't how she wanted Keith to find out, but there are other important matters to attended to. Keith is frustrated at this, but he finally accepts that they'll talk later about it. They resume their mission.

Soon they head for the quantum abyss. Once there, they're attacked by unknown creatures, forcing them to ditch their ship. They know they must keep going forward, so they continue on foot, just on the outside of the space time. They see a bright flash of light, Krolia jumps in front of Keith to shield him from it, enclosing herself around him to protect him from whatever it could be. Keith sees a vision of the past - his parents holding him as newborn. Once the vision passes, they're back to traveling. Keith is hit by a large rock, knocking him back into the pull of the quantum abyss. Keith struggles to jet pack out, finally throwing his knife attached to a rope. Krolia jumps to his aid, grabbing hold of the rope and pulling him just as another vision hits. The vision they see of Keith's parents. Once out, Keith looks to his mother, saying, “I finally understand why you left: you put the mission above all else.” Krolia then turns to him and says, “That's not true. I left to protect the person I must love. You.” Keith is lost for words at hearing this.

Moments later, a massive whale-like creature comes up to where they're standing. Realizing if they want to make it into the quantum abyss their best shot is jump aboard the animal. They soon make a home for themselves, waiting until they pass through to the other side. They soon witness something falling through sky before crashing down. They go to investigate, only to discover it's a wolf-like puppy. They defend it against hostile creatures, soon taking it in and caring for it.

Two years have passed when they finally reach the end of the quantum abyss, allowing them to complete their mission. They soon pick up a single on the planet directly ahead of them, leading them to a base. All three enter and greeted by an Altean.

Quotes
"I left you once. I’ll never leave you again."

- Krolia, Bloodlines.

Fanon
With the appearance of Keith's mother, fans jumped at the opportunity for some nice mother/son bonding. Their relationship quickly became an unbiased favorite. In most fan works Krolia is very supportive of Keith, but also quite protective of him.

Fandom
AO3