The Storm King's origin serves as the basis of My Little Pony: The Movie Prequel Issue #1. In the issue, he and his second-in-command Strife invade the Abyssinian capital of Panthera, plundering all the palace treasure and setting fire to the rest of the city. However, Strife later betrays the Storm King and allies with Captain Celaeno and her crew of parrot pirates. The Storm King, enraged by this betrayal, appoints Grubber as his new second-in-command.
In Issue #2, the Storm King catches up with Celaeno's ship, tosses Strife overboard for his betrayal, and forces Celaeno and her crew to work for him as cargo haulers.
In Issue #4, the Storm King tracks down Tempest Shadow, who has been in possession of the Misfortune Malachite while fleeing from his Storm Creatures. The two then form an alliance, with Tempest agreeing to become the Storm King's new lieutenant in his search for magical power in exchange for the Storm King healing her broken horn.
In The Stormy Road to Canterlot, the Storm King meets a broken-horned Unicorn who stole the Misfortune Malachite from his possession. He offers to fix her horn if she can retrieve a pearl from the kingdom of Hippogriffia. After the Unicorn, now going by Tempest Shadow, fails in this task, she suggests stealing the magic from the three Alicorn princesses of Canterlot, to make him more powerful.
In My Little Pony The Movie, the Storm King appears as the central antagonist. His second-in-command Tempest Shadow, underling Grubber, and army of Storm Creatures are sent to Canterlot as an advance force to occupy the city and secure the magic of the four Alicorn princesses. In his first on-screen appearance, the Storm King communicates with Tempest via potion spell, and he reminds her of the terms of their agreement: deliver to him the princesses' magic and empower his Staff of Sacanas in exchange for restoring her broken horn.
Later in the film, Princess Skystar reveals that she, her mother Queen Novo, and the rest of the seaponies used to be Hippogriffs and live atop Mount Aris before the Storm King invaded and forced them to flee underwater.
After Twilight's capture, the Storm King appears before her and uses the Staff of Sacanas to drain her and the other princesses' magic, granting him massive power and control over the sun and moon. When Twilight's friends come to her rescue, the Storm King uses his newfound power to create a powerful cyclone. Tempest tells him to fulfill his end of their agreement and restore her horn, but he reveals that he was just using her and attacks her. Before the Storm King can destroy Twilight and Tempest, the rest of the Mane Six intervene and knock the Staff of Sacanas out of his hands.
As the staff's magic runs out of control, the Storm King and Twilight race to claim it, and they are both swept into the storm. They soon return to solid ground, and the Storm King attempts to turn Twilight and her friends to obsidian stone. Tempest, changed by the Storm King betraying her and Twilight saving her from the storm, jumps in the way, and they are both petrified. The Storm King's body falls off the castle balcony and shatters to pieces.
Despite his intimidating appearance, he's actually quite a charismatic, laid-back, all-around friendly guy even while he's reducing entire nations to their knees. He is also just as humorous as he is a threat. He straddles close to faux affably evil, however, when he explains that he is a staunch opponent of concepts such as friendship. The prequel comic suggests him to be an animalistic abomination, but he refers to himself as a force of nature; not a king of storms, but a king who is a storm.
He's a very benevolent leader, as he is shown treating his soldiers incredibly well in the prequel comic, even planning to throw them a party for their services in conquering and pillaging in his name. As he later says, it's simply to ensure their loyalty to him as he sees them as mere enforcers of his will. The Storm King's actions seem to be driven by practicality and self-interest before other considerations, with little in the way of either genuine compassion or needless cruelty. He's very generous towards his soldiers and treats them extremely well, but this is simply to make sure they remain loyal to him. He also doesn't bother to enforce his rule on the nations he overruns, since he doesn't want to get saddled with the minutiae of ruling and administrating, simply sacking them for all they're worth before moving on.
His speech about friendship in the prequel comic firmly cements him as deliberately having no friends, seeing them as distractions and potential traitors.
- "Where am I supposed to be looking? I never understand how this spell works. Tempest! (Tempest Shadow: Over here, Your Excellency.) Where? (Tempest Shadow: Over here.) Huh? (Tempest Shadow: No. No, right. Look right.) My right? (Tempest Shadow: Yep.)"
- "Oh. There you are. Here's the deal. I'm in the middle of a big re-brand here. "The Storm King" is tracking well as "intensely intimidating", but you know what? I need to back it up. You know what I need to back it up with? A storm! That would be great! You promised me magic that could control the elements, and right now, I'm holding a what? A branch. A twig. Bleh!"
- "(Tempest Shadow: Uh, that would be the Staff of Sacanas, Your Excellency, and it will...) Mm-hmm? (Tempest Shadow: ...channel the magic of the four rulers of this land.) Mm-hmmmm? (Tempest Shadow: You'll soon have the power of a hundred armies.)"
- "So that would be a yes on your locking down the four Pegacornicuseses, or whatever you call them?"
- "Remember, Tempest. Only I have the power to make you whole. Make this twig work, and you'll get your reward. Fail me, and your horn won't be the only thing that's broken."
- "(Tempest Shadow: It won't be a problem.) [upbeat] Great! [warbling] I'm ready to power up, crash and bash, and be the biggest, baddest bugaloooooo..."
- "(Tempest Shadow: Your magic? Did you think you'd keep it all to yourself? Time to share. I'd love for everybody out there to know what I can really do.) Ooh, fascinating! What can you really do? (Grubber: Your bidding, of courth, Your Mighty One.) Bidding's good. I like bidding! Um, what are you supposed to be? (Twilight Sparkle: I'm the Princess of Friendship!) [laughs] Oh. That's nice. [to Tempest] Why is this one still moving? (Tempest Shadow: She and her friends put up a bit of a fight, but she's alone now. She won't be a problem.) Yeah. So, speaking of problems, This place, it seems a little too, oh, I don't know, CUTE! I don't like cute! I never did like cute! Doesn't really go with the whole 'big, bad, powerful magic guy' thing, does it?"
- "Deliver the punchline, Tempest, because this has gotta be a joke!"
- "[laughs] Check out the light show! Wow! Wow!"
- "Let's get this storm started! Oh, hey, that's good, I should trademark that!"
- "Not bad. Actually, kinda first rate. What else does it do? (Tempest Shadow: Your Excellency, you promised to restore my horn and give me—) Deh-deh-deh-deh-deh, okay. Hang on."
- "You gotta be kiddin' me! I can move the sun?! A ha ha! Wow! Now this is what I'm talkin' about! Ha ha! Time to play! Tuesday, Wednesday, Thursday, Friday! Day, night! Day, night! Day night! Day night! Day night! Sunrise, sunset! [humming gleefully]"
- "(Twilight Sparkle: [gasps] It's... It's the Magic of...) Yeah, yeah! Friendship, flowers and ponies, Bleh! I'm SO TOTALLY over the cute pony thing. This... ends... now!"
- "[maniacal laughter] Yeah!"
- "Now I truly AM the Storm King! And the entire world will bow to my ba-ba-ba-boom, baby! (Tempest Shadow: Yes, yes, you are every bit as powerful as I promised, Sire, now, restore my horn and I swear to use my magic to serve you!) [laughs] Who cares about your dinky little unicorn horn?! (Tempest Shadow: But... we... we had an agreement!) Get with the program! I used you! It's kinda what I do!"
- [sarcastically] Awwww! Isn't that just so sweet! [laughs] Yeah. See ya!
- [laughs] Ooh!
- "The Staff belongs to me!"
- No! That's my staff!! [grunts]
- Miiiiiine!! Mine!!!
- Oh NO NOOO!!!!
- I'm Not Done Yet! (Tempest Shadow: He's Back!) TRY THIS ON FOR SIZE! (Tempest Shadow: Nooo!!) No Stop Please I've... I've Change My Mind!!!!
Role in the Series
His real name is revealed to be Sacana Heaven or Sacana Storm, changing since his family was converted from the Heaven Clan servants of Lord Order to The Storm Clan servants of Lord Chaos. Since he was smashed as a coal statue thanks to Tempest Shadow after betraying her loyalty, he was revived by his sister The Valkyrie Queen, even though she didn't really wanted to but did so out of obligation in family decree, and discovered that since his death, his family lost their edge as this affected his father, The Hurricane King, into being fatally ill out of a broken heart and spirit, and even being revived wouldn't stop him, as this allowed him to replace his smashed staff with his father's, which was indestructible and 10x more powerful, as he swore to get revenge by the episode The Return of Storm King, where he seeks info on Tempest Shadow after learning that there's more to her than he originally viewed, by learning of her relationship with a 'pestering pony' Aphelion Shadow and her little sister, the adopted daughter of Pred Judu Des named Hidden Shadow, and with his father's staff, he has more than enough power to get revenge, as he also gets Muncher, and ends up falling again, but this results in him going missing, and thus his family clan ultimately becomes the main antagonists of Season 4's third and fourth saga. After going missing for a while, he later returns in For The Hippogriffs teaming up with The Weather King, who aimed to steal all the magic power from the hippogriffs in the middle of a sibling war between Queen Novo and Queen Corono, and then returns again in Back to Equantica where his revenge is then focused solely on the Hippogriffs' saviors and allies, the Seaponies, and their Merpony cousins in Equantica, where he uses the people of both lands, with the temporary aid of Mantrek, to gain the Pearl of Maricolous and get the power to destroy both the Hippogriffs and Seaponies, betraying Mantrek and stealing his plans and combining it with his own. He's also prone to correct others who mistake him to be a Yeti or monkey-based creature because his appearence isn't exactly accurate to what satyrs typically look like, as his people, the Panan Satyrs, are the result of interbreeding between Equestrian satyrs and pans, hence why Storm King resembles yetis more than basic satyrs. It doesn't exactly make him less secure about his appearance. It's also revealed that he's a sociopath because he views the world around him as inferior to his views of magic being worth nothing more than power due to how they use it, and even if they were capable of destroying threats like Mortuus, he views them as frivolous and something out of a little kids' cartoon, and thus not so strong. He also has a rivalry with the dreaded Grogar, who's 100x the conqueror Storm King will ever be.
- Human Equestria Storm King: Storm King's alternate Equestria Girls counterpart is also revealed in the series, as he is a leading member of the Human Equestria's Central Intelligence Agency (CIA), having been rendered that way after being a rare individual with a past life of crime lead to him and his family going into the CIA to make the world 'realistic' after learning of it's story upon discovering Coo for the first time, viewing it's utopian society of only petty arguments and minor fanatics as 'unrealistic', and aim to make it into a world like that of other dimensions like the UUniverses, unaware that Coo, after having it this way for so long because of her fear of war and mortal danger, hasn't had the time to get the thousand-year education of how to make it that way, and thus the world will not be able to tolerate their influence. The family possess crystals that contain Equestrian magic that allow them to steal magic from anybody in a near-similar way to Sci-Twi's magic pendant device, allowing them to grow in power and eventually gain strong forms similar to their alternate counterparts.