That series finale right? I imagine this being set when they are already more grown up, like in Adora's perfect future. Enjoy!
Catra shut the door behind her and locked it the moment after. She ran a gloved hand through her long mane up to her ponytail and exhaled unevenly. She hadn't felt this helpless or trapped since she left the Hoard, since the chip had been removed, since she had kissed Adora for the first time. Now she felt like a kid again, running to the shadows to conceal herself in the privacy of her room, at least now she had a room, one she shared with-
A knock cut her short as her ears perked up.
"I'm-I'm going to change, Adora" she called from the other side of the door, but there was no attempt to turn the handle.
"Adora is still at the breakfast table with Bow" replied the Queen's voice.
"Sparkles" Catra huffed, if nothing it was a relieve it was her and not Adora "I'll change and then take a walk through the woods, I'll take Melog, so if you could tell-"
"You have been avoiding Adora" Glimmer interrupted her with a stern voice.
"I have not!" Catra retorted stubbornly.
"Please, not even I could teleport fast enough out of a room to leave as quickly as you do every time you are about to be left alone with her"
"I'm not running from her!"
"Oh really?" Glimmer's tone was certainly unimpressed "Because if I wanted I could puff her inside right now and lock you both in"
"N-no! Please don't" Catra begged placing both hands over the door, the panic in her tone was so evident it made Glimmer's heart ache a bit.
"Catra?"
There was a silence and Glimmer feared the other woman had perhaps jumped through the window and into a tree to make her grand Escape. She was about to teleport inside when she saw Catra's shadow still glued in place.
"I'm going to sit right here outside the door, okay?" Glimmer said laying her back against the frame and sliding down to the floor. She could hear Catra do the same. Now they were back to back divided by a wall, each on their side, each in solitude, but neither alone.
Catra clasped her hands together digging her nails against the soft part of her palms.
"Did…did Adora asked you to come?" Catra ventured to ask, her voice weak and soft.
"No" Glimmer assured "As far as she and Bow know I went to talk to my dad" she let another pause pass them by before breathing in "You have been avoiding her" Glimmer pointed out more calmly than before "Even for someone as dense as Adora she's beginning to notice it too, she just tries to hide away the pain"
Catra hugged her knees to her chest wrapping her tail around her ankles "I don't want to hurt her" Catra answered, her tone honest and vulnerable.
"Then why are you doing this?" Glimmer insisted turning over her shoulder even if she couldn't meet her eyes.
"Because she's about to do something stupid!" Catra threw her hands up.
"What are you talking about?"
Catra pressed the heel of her palm against her mismatched eye trying to stifle a sob "Your-your dad told us about this tradition you Etherians have, something to bound your life to your partner, to commit, to stay by each other's side forever"
Glimmer's eyes went wide "Marriage?"
"Yeah" Catra chuckled out of breath "I think that's what he called it" Catra sniffled "Ever since that Adora has been looking at me differently, she thinks I don't notice her little research, how she's been asking about the tokens you exchange and such"
"She's trying to propose to you?!" Glimmer exclaimed turning around just to be faced by a door "Catra that's-!" but she didn't finish the sentence because she could feel Catra's guilt, her somber aura "You…you don't want her to?" Glimmer mumbled.
Catra hugged herself even tighter digging her nails on the fresh of her own forearms fighting against the tears.
"I-I don't understand" Glimmer knelt before the wooden door "Don't you love her?"
"Of course I do!" she yelled heartedly, wounded by even hearing that assumption "That's why I don't want her to propose" she confessed "She deserves better than me"
Silence. And there it was, the realization hit Glimmer as winter's cold breeze.
"Catra" she whispered.
"I always thought she would outgrow me, some days I was selfish enough to think she wouldn't but I became to fear she would get stuck at my side" Catra shut her eyes tight "She's…she's more than She-Ra to me, more than the savior or the hero, she's…she's been my life… I learned her name before I even knew what to call the sun, I held her hand before learning how to fight, she's my friend, my love, my…my home" she decided not to fight the tears anymore "And I only could ever hurt her…for so long I thought I could redeem myself, be better of what the Hoard built me to be but…but I am not enough to be the person to stay by Adora's side forever. I always knew this would come to an end because Adora deserves so much more of what I am, of what I could become, she can't get married to me" she finished "That's why I can't face her right now, because the moment she says something I don't know if I will have the strength to say no" she hung her head in shame.
"Catra…" Glimmer breathed in "you…idiot!" she didn't care anymore, she puffed herself right in front of her and grabbed her shoulders tightly gazing into her heterochromatic eyes "You absolute moron!" Glimmer's eyes were teary "you don't get to decide who Adora wants to propose to! You don't get to look down on yourself like that! You have come such a long way! You saved Etheria too, you saved Adora, you've changed!" she shook her shoulders "You are not an outsider in this palace, you don't get to hide behind a door and lurk in the shadows anymore because you belong in the light too, you are part of Bright Moon, you are not a Hoard soldier plotting the next attack, you are not your past anymore, you've grown" she said heartedly "And so help me if you don't realize this you big dummy, but you are my friend and we have been for so many years now and if you think I only let you live here because of Adora I will let you drop from a cliff and into the ocean because with my ancestors as my witnesses, I trust you. And I know you are perfect for Adora"
Glimmer all but shouted at her face, her rage was mixed with hurt and sadness, all encircling her true feelings; she was hurt that Catra still thought so little about herself. The now Queen was breathing heavily, pressing down Catra's shoulders, pinning her against the door without a chance to escape, but upon seeing her yellow and blue eyes inspect her with such shock and helplessness, she let all her anger go.
"I'm so-"
But Glimmer didn't get to apologize, she really didn't needed to in Catra's eyes, because the brunette had just wrapped her arms around her waist and was hugging her tightly, with all her might.
"Thank you" was the only thing that left her lips as she hid away against her shoulder.
Glimmer slowly let the image sink in as she gently enveloped her arms around.
"You are welcome" Glimmer stroke her back gently "And I mean it, Catra. You are worth it"
Stay tuned fro more and I hope you liked it!