#cross sand

my three favorite (not) sanses

A Bad sanses x Gn reader fanfic

MDNI

Masterlist

Chapter 1 - Chapter 3

TW - mentions of panic attacks, death and violence.

I do not own Undertale or any sans au variants, I'm just writing a fanfic about a royal au Imao.

Not related to any already written royal au btw, this is my own thing. You also aren't related to anyone mentioned or seen. You're a human.

Summary: The kingdoms of light and dark have been at war for centuries, bloodshed and devastation that never stops. A table of trusted confidants sits close to the king of light, a chair belonging to you. Your skills with a sword are undisputed, but your king has a new task for you.

Marry the king of darkness to unite the kingdoms in the face of a new threat. Will the two kingdoms be able to overcome their strife with a simple marriage? Or will both crumble in the face of their own hubris?

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The nearest full moon was only a few days away, like the imposing storm that gathered clouds in the distance. You stood on the balcony connected to your room, staring out at the gloomy horizon that had made itself home the day you were given your fate. The town below was quiet for a change and you pretended for a moment it was in protest for your sake. It wasn’t.

Nothing seemed to make you feel better. The anxiety kept festering, becoming worse as the days went on. Your panic attacks while private were frequent in the dead of night. Your entire life was to change and you hated to admit that notion scared you. Fear wasn’t a person you knew well, and meeting with them was the equivalent of facing a disappointed parent.

What took you so long? Why haven’t you visited? Or written me?

Because when I see you it’s like crawling away with a sword wound in my side. I push you away because we don’t understand each other and every time I see you, I end up hurt.

You leant forward on your elbows, the marble cooling your skin in almost an uncomfortable chill as the wind blew against you. Today, you’d be debriefed about your expected duties as a spouse to the King of Darkness and start preparing to leave your home behind. You looked up to the sky as thunder rumbled in the distance, stepping inside just as the rain reached your balcony.

“[Name].” The head maiden of the castle, a woman you knew well and became friends with in your youth walked into your room. She was adorned in covering fabrics of gold and white that stopped just below the ankles and end of the wrists. A large, orange sun was painted on the back of the robes and small, orange stars lined the ends of her sleeves. She was elegant and stood tall, a motherly figure that had led you in the right direction more than once.

“Madam Toriel, hello. Good to see you this morning. I’m in need of a friendly face.”

“I figured as such. I am saddened to see you go soon, but I am excited for you.” A sigh left you, letting her look through your closet for the proper attire you barely wore. You sat on your bed, picking at loose strands in your blankets, “I can’t say I feel the same way.”

“Why is that my dear?” Toriel pulled a beautiful pile of silks from the back of your closet, all white, orange, and gold. She held up each one, letting it unfold and flapping them to air out their elongated time in the back of your wardrobe.

“I am being married off to a man I’ve never met and my life is being stripped from me. No one even consulted me, like my opinion didn’t matter. It feels like I was to be bought and sold.” Toriel paused her fluffing of your neglected fabrics, slowly seating herself beside you on the bed, “oh, my dear. I apologize. I had no idea you were unsure of this marriage.”

“What do you mean?”

“The king made it seem as though you were delighted and heartily accepted the offer. I am bothered that he would sugar coat such a matter when you are obviously not pleased.” The anger in you screamed out at your words and reaction being twisted, but you didn’t let your expression falter, “that is..not kind of him. I want to stay here with you and continue my life as it is, not marry a stranger.”

“Maybe leaving is your best choice.”

“Whatever do you mean?”

“I mean that this is a sign. The king has made his point clear, so what you can do is leave and do your best in your new environment. He’ll see what he’s missing when you are no longer here, which is the best kind of revenge.” You took her words and mulled over them a moment. Get revenge? By proving your worth?

A determined smile graced your features, standing to your feet, “alright then.” Toriel stood with you, “what epiphany have you had my friend?”

“I will do as you instruct! I will prove to the king how valuable I am by proving myself to my fiancé! I will make him realize how valuable I am by working just as hard for his brother, maybe even harder.”

“Oh! That’s wonderful. Let’s get you dressed, there’s much to be done.” You nodded and dropped your pajamas to the ground. You could do this. You would not fail.

—

“I- um- don’t know what this has to do with marriage.” Why were you balancing books on your head? What was the purpose of such a silly balancing act? It was easy to do so, but you felt like a fool with a book of fairytales and a cookbook balanced on your skull. The Ink-stained skeleton in front of you pulled another elegant stance, watching you copy it with little effort. One had to be elegant to wield a blade, so this wasn’t a difficult test.

The skeleton was one that also held a chair at the King’s table, but he rarely showed up to meetings. He was always doing something, getting distracted, or handling the king’s dirty work. His scarves were long and dragged on the floor, ink covered him in splotches that could never be wiped away, and his weapon of choice was a large and magical paintbrush.

He sighed like you’d tired out his thought process, taking the book of poetry and butterflies off his own head, “one must be balanced and elegant when marrying a king. You must walk with purpose and be smooth and fast with your movements.”

“I already am. I’ve fought in front lines and trained with a sword.”

“Yes, but you’re elegant like a soldier, not like a spouse. Your movements are all sharp like you’re ready to kill, you need softer motions.” The books slipped off your head when you leant it forward, catching both of them, “I’m guessing the books is to prove I can keep balance?”

“Exactly. We’ve been at it for a while now though, so let’s take a break to talk over arrangements.” You both sat at a nearby table in the grand library of the palace. Ink pulled a large book from somewhere in his coat, opening it up and skipping the first half to the middle.

“The night before departure, your room will be packed away into a carriage. That includes all personal items, clothes, tools, and any small furniture we can fit in the carriage with your things. You will be dressed by our head maid in the traditional attire of the Kingdom of Darkness and will be escorted there by Blue, myself, and three of our best knights. You will not have any weaponry but your family sword, as it is your’s by birthright. You will be civil, kind and-“ he went on and on. Rules you already knew were repeated to you like you were an idiot with zero know-how. Zoning out, you ignored the rest of his monologue until he snapped the book shut, “that’s all for today with me.”

“Really? That’s it? A balancing act and a lecture?”

“What? Want me to continue on? You already know how this goes, this was just something I have to say I did. The king knows when one is lying so I actually had to do it.” He shoved the book back in his coat, “off you go. Take the time to say goodbye and settle any scores.” The skeleton walked off with no departing words, leaving you to stew in your frustrations at the table. Settle scores? You had none! Say goodbye? Your only friends were Toriel and-

Right. You had to go see him.

You stood abruptly and strode out of the library, walking further and further into the castle until you reached the grand ornate doors that led to the back gardens. The only people allowed inside were those who sat at the king’s table and though you were being sent off, you still held that title. You pushed the doors open and took in the rainy scenery around you, though not ideal, that did not matter.

Your feet led you down the wet cobblestone path and into the hedge maze, something you helped design many moons in the past. It was mostly decorative but did keep any snoopers away from the important people that rested at the center. You reached it with zero struggle and crouched in front of a large headstone where flowers bloomed around it in all the colors of the soul. You gently swiped away a layer of greenery to read the name, “Gerson”

“Hello old friend. I’ve come to say goodbye.”

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That’s all for now! Have a nice day and stay safe!