#DeltaruneCH5Concept
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jkirb.bsky.social
Just thought of this while listening to the CH5 Shop theme teaser :)
#Deltarune #Deltarunech5Concept
Green Flowey's Shop! They are very cheerful towards the Lightners and happy to see them, especially Kris
January 6, 2026 at 6:09 PM
jkirb.bsky.social
Freedom
#Deltarune #DeltaruneOC #DeltaruneCh5Concept
Tellie standing under a spotlight One hand holds her cowboy hat, while the other is outstretched. Reaching for her freedom.
December 14, 2025 at 6:36 PM
jkirb.bsky.social
I’m pretty excited for Chapter 5, so…..
I made a clay figure of my secret boss OC Tellie!!!!
I LOVE HOW SHE TURNED OUT!!!!!
SHE’S SO CUTE AND SHE’S REAL!!!
(I also made the Flowey darkners, which I forgot to post about)
#deltarune #deltaruneoc #deltarunech5concept
June 14, 2026 at 12:56 AM
jkirb.bsky.social
Deltarune tomorrow but Chapter 5 concepts/OC's!
(My last minute predictions in the comments!)
(1/6)
#deltarune #deltaruneoc #deltarunech5concept
My Deltarune Secret Boss OC, Tellie, surrounded by all the different colored floweys. All of them are so excited!!
June 24, 2026 at 1:29 AM
jkirb.bsky.social
Here's my Chapter 5 concept/prediction/theory :O
Warning: SPOILERS FOR LITERALLY EVERYTHING
Since most theories have a funny name, I call this the Undertale 2 theory
I hope everyone enjoys reading :D
(1/9)
#Deltarune #DeltaruneSpoilers #DeltaruneCh5Concept
a pixel art cartoon character is standing in front of a bulletin board with papers on it .
ALT: a pixel art cartoon character is standing in front of a bulletin board with papers on it .
media.tenor.com
December 7, 2025 at 6:59 PM
jkirb.bsky.social
Secret Boss time!!!!
I wrote a lot for this 👀
I also wrote dialogue
(Never really done this before so if it's out of character or not that good, sorry)
Hope you enjoy reading :D
(1/8)
#Deltarune #DeltaruneSpoilers #DeltaruneCh5Concept #DeltaruneOC
a cartoon character in a tuxedo is holding a cane and pointing at something .
ALT: a cartoon character in a tuxedo is holding a cane and pointing at something .
media.tenor.com
December 8, 2025 at 6:16 PM
jkirb.bsky.social
Oooo what if!!!

Each Flowey has a unique move that correlates with the soul color and the move from Omega Flowey’s fight :O

A lot to think about…
#deltarunech5concept <—— keeping the idea for later
June 9, 2026 at 5:22 PM
jkirb.bsky.social
I wrote a “Silly” short story about Tellie in the old days!!

archiveofourown.org/works/83302591

(I am not sorry for the angst for both Tellie and Tenna)
#deltarune #deltarunech5concept #deltaruneoc #tenna
April 17, 2026 at 9:00 PM
jkirb.bsky.social
Chapter 5 Concept/prediction Officially posted :D
#Deltarune #DeltaruneSpoilers #DeltaruneCh5Concept
archiveofourown.org/works/81037626
March 11, 2026 at 7:32 PM
jkirb.bsky.social
Cute Little Flowers with Familiar Outfits/Items!
#Deltarune #DeltaruneCH5Concept
The Floweys from my concept but they are wearing the armor and weapons that the fallen humans had in Undertale -Flowey with the heart locket and the Real Knife -Cyan Flowey with a red ribbon and a toy knife -Orange Flowey with a manly bandana -Yellow Flowey with a cowboy hat and a gun -Blue Flowey wearing a pink Tutu -Purple Flowey with glasses and a book -Green Flowey with an apron and a frying pan
January 18, 2026 at 6:37 PM
jkirb.bsky.social
She does play a role in my concept >:)
She has a drastically different design too...
Pink and yellow...
#DeltaruneCh5Concept
Tellie chapter 5 sneak peak
November 28, 2025 at 7:08 PM
jkirb.bsky.social
Drew a scene from my concept + Lore + Funny
#Deltarune #DeltaruneOC #Ralsei #DeltaruneCH5Concept
Ralsei and Tellie sitting together and talking This is the scene where Ralsei is trapped. Tellie refuses to help, so they have small talk that eventually goes to their purposes as Darkners Tellie with cyan flowey comforting her She lost everything Description text revealed by Toby that states that TVs are good at talking, but bad at listening Ralsei warns Tellie that cyan flowey is behind her, but her ass is not listening while she is monologuing
January 8, 2026 at 6:35 PM
jkirb.bsky.social
Is it human to be waiting?
For something you can settle on
Never changing, a dutiful automaton
If that's the tempo I'm meant to follow
I'll lose the beat to be complete and fall
I'll be human after all
(Human - Flavor Foley)
#Deltarune #DeltaruneOC #DeltaruneCh5Concept
Redraw of a frame of the Human by Flavor Foley video Tellie is facing the screen, her colors are monochrome and deprived of color Thorny vines are going towards her, stabbing her in a way Redraw of a frame of the Human by Flavor Foley video Tellie is in her old outfit before she had to only play the cowboy show (Her ideal form) She is smiling and happy and the vines surrounding her are covered in flowers
January 1, 2026 at 6:33 PM
jkirb.bsky.social
Start of Chapter
(3/9)
#DeltaruneSpoilers #DeltaruneCh5Concept #Sans
Start of Chapter 5 Sans: hey kid. wake up. Opens Kris’ window curtains Sans: it’s a beautiful day outside. birds are singing. flowers are blooming. on days like this… kids like you…. Screen suddenly turns to black then turns back to normal again Sans: should be going to the festival today. sorry about the lights. had to make sure you were awake (Bro knows what he is doing)
December 7, 2025 at 6:59 PM
jkirb.bsky.social
Reworked/redesigned Tellie to fit Chapter 5 more :)
This is how she is if she wasn't sleeping the whole time!
#deltarune #deltaruneoc #deltarunech5concept #flowery #deltaruneyellow #deltaruneblue #deltaruneseth #deltaruneaqua #deltarunegreen #deltaruneorange
August 20, 2026 at 1:11 AM
jkirb.bsky.social
Final Boss battle
(8/9)
#DeltaruneSpoilers #DeltaruneCh5Concept #Ralsei
Ralsei also gets his own secret boss fight in this chapter! Yippee!!! Like Kris and Susie :D Ralsei gets new armor or a weapon too! I will explain the secret boss and her role in the story as well in another section >:) But Ralsei plays a role for the secret boss as well Ralsei also plays a role in the final boss battle of this chapter. Final Boss Battle The Final Boss battle of this chapter is Asgore (crazy I know) His boss would be very similar to the one in Undertale. Possibly only being able to fight, no mercy. The reason for this is because of the floweys. While you fight Asgore and try to act, the flowers would say things that would make Asgore even more determined to stop the fun gang. (The final stray being Dess’ disappearance) It would be interesting if these guys also acted against you. Spoilers for Undertale, but in Undertale, Flowey also has the power to save, like Frisk. He also has the power of Determination, so it would be cool to have them have the same powers as the soul in Deltarune. Second phase? Ralsei looks a lot like Asriel. So what if… As a last resort, the flowers would trap Ralsei and combine with him. (Similarity to how Flowey combines with the souls) Asriel!!?? “He’s always getting mixed up in flowers, isn’t he….(that hasn’t happened)” - tricky Tony I think this would be cool :)
December 7, 2025 at 6:59 PM
jkirb.bsky.social
Ralsei Role
(7/9)
#DeltaruneSpoilers #DeltaruneCh5Concept #Ralsei #Flowey
I will find it interesting if Ralsei is jealous of Kris and Susie’s lives. Ralsei has grown desires he can’t have, such as living a joyful life with his friends. Hanging out with them. Going to the festival together. He knows what that feels like. In chapter 2, he gets to hang out with Susie. He wants more of that, but he can’t. He isn’t supposed to. This isn’t what the prophecy asks of him. “The vast garden is charred in an inferno of jealousy" Ralsei is learning an offensive fire move in this chapter. Something might influence him to use his powers. Or someone. I think it would be interesting to have the gang split up. Something would separate them, and leave Ralsei alone for a bit in the chapter. (Would the soul also be able to see what Ralsei is doing? Control him? Talk to him? Would Ralsei be aware if he hears “Kris”) When they split up, Susie and Kris try to find Ralsei in the castle, while Ralsei is stuck in the castle. Little Flowey here acts like he wants to help Ralsei, when in reality, he just wants to influence him to use his powers to harm Kris and Susie. He claims that he wants to help Ralsei stand up more for himself. “Use your powers” “Get what you want” “No one will stop you” Possibly something would make Ralsei snap, leading to the burning garden.
December 7, 2025 at 6:59 PM
jkirb.bsky.social
Conclusion :D
(8/8)
#DeltaruneSpoilers #DeltaruneCh5Concept #DeltaruneOC
Conclusion I miss Tellie :( Also I like to lean into the Undertale elements, if you couldn’t already tell :) I don’t think Asgore’s TV is going to play that big of a role, or even become the secret boss. I just found it interesting to make a little twist on Tenna’s character. I really love Tellie a lot. While making her, I realized how much she fits as a secret boss character looking for freedom. She is also supposed to reflect Ralsei. Spamton reflects Kris, Gerson with Susie, so I thought to make a character to reflect Ralsei as well :D Thank you for reading my yaps about my OC! Hope you love Tellie as much as I did :D
December 8, 2025 at 6:16 PM
jkirb.bsky.social
End of fight and armor/weapon
(7/8)
#DeltaruneSpoilers #DeltaruneCh5Concept #DeltaruneOC #Ralsei
After the fight, Cyan Flowey is still alive, but very beaten up. They run away before Ralsei can do anything else. Ralsei stands there for a moment. You got the Shadow Crystal! :D For the pacifist version, you also get Tellie’s flower as a piece of armor! Your healing magic is stronger and it offers a lot of defense! Offense decreases though. For the “genocide” version, you get Tellie’s cape as a weapon for Ralsei! This is a really strong weapon, and offensive magic gets a big boost too! Healing decreases though.
December 8, 2025 at 6:16 PM
jkirb.bsky.social
Why the Secret Boss?
(2/8)
#DeltaruneSpoilers #DeltaruneCh5Concept #DeltaruneOC #Tenna
Tellie Vision (Ellie) “What’s the opposite of I miss Tenna?” I pondered on what this could mean. Tenna is coming back and we hate him!? [KILL YOUR TV!]? Then I remembered that Asgore has a TV in his shop. When I was first thinking about Tellie, I thought of making her into a worse Tenna. A Tenna that dies and would make you say “Damn. I’m so glad that they’re dead! I will not miss them!” However, I felt that having another Tenna would make chapter 5 feel too similar to 3. I love Tenna, but I really don’t want another TV Darkner to be the main boss of the chapter. So I made her the secret boss >:)
December 8, 2025 at 6:16 PM
jkirb.bsky.social
Festival and Entering the Darkworld
(4/9)
#DeltaruneSpoilers #DeltaruneCh5Concept #DeltaruneSusie #Ralsei
Since there were castle town cutscenes, the player would likely be able to visit castle town while the festival is still being set up. Kris and Susie would meet Ralsei here as usual and hopefully their friendship didn’t get too strained after the whole prophecy thing. After doing everything, Ralsei would tell Kris and Susie to have fun at the festival. It would be interesting to see a more negative side of Ralsei. I don’t think Ralsei would be the same after Kris and Susie found out about the prophecy’s events. Ralsei might be more honest but pessimistic, a bit more prone to get frustrated or even jealous of Kris and Susie. (This will come back later) Kris and Susie arrive at the festival! Hometown is decorated and filled with lots of stalls and games. Everyone is out and about enjoying the festival! However, Noelle is absent from the festival. Susie possibly notices this as we talk with the NPC’s or go to every place in hometown. As Susie is about to suggest going inside the buildings a funny interaction would play with Berdly (If he didn’t get you know what). He would try to ask out Susie, or take Kris on a date if you chose to do so in the last chapter, but Susie turns him down and moves Kris to another place. Susie makes a plan with Kris. Since Ralsei can’t go to the festival with them, they will try to bring the festival to him! They also plan to look for Noelle, while going to every stall to find things for Ralsei. The lightworld section for this chapter is having fun in the festival, lots of mini games and many items to find (which can turn into equipment and items in the darkworld) After getting enough items, Kris and Susie would end up near Asgore’s flower shop. Susie would comment on how she hasn’t seen Asgore’s anywhere either. Susie thinks of getting flowers for Ralsei, maybe Noelle too (probably a choice from the player) Since Asgore is Kris’ dad, she believes that he would give them flowers for free. Oops! Darkworld was opened. Here we go again Kris and Susie explore around the flower field and talk to many darkners, a lot of them commenting about their king. Possibly treating Kris like royalty as well. After a bit, Ralsei would appear like he usually does. Susie immediately tells him about the festival and all the things they bought for him! She talks about all the fun things that were there and tries to get Ralsei to try everything. Ralsei however does not respond at all during this. His expressions are stoic and slightly frustrated. Even if Susie had good intentions, it would make Ralsei feel worse about not being able to go, and his desire to wish that he could just hang out with Kris and Susie. Ralsei isn’t supposed to feel these things, his only purpose is to guide the heroes, not be friends with them, not to want to hang out with them. After a bit of this, Ralsei interrupts Susie and goes straight to the point and tells Kris and Susie that they need to close the dark fountain and get Asgore out of here. Not sure if Ralsei would mention the Flower man trapped in an asylum prophecy line, since I think Ralsei would stop hiding things from Kris and Susie. I feel like after chapter 4, Ralsei stops hiding things from Kris and Susie, we will possibly see a more pessimistic side of Ralsei as well. Ralsei would want everyone to stop getting distracted and just get them to finish the goal, in order to stop making him feel or do things that he isn’t supposed to (Defying the prophecy).
December 7, 2025 at 6:59 PM
jkirb.bsky.social
Secret Boss Concept (Tellie) Officially posted :D
#Deltarune #DeltaruneSpoilers #DeltaruneCh5Concept #DeltaruneOC
archiveofourown.org/works/81038356
March 11, 2026 at 7:47 PM
jkirb.bsky.social
Adding this to my concept as we speak
This is very important.
#DeltaruneCh5Concept
February 11, 2026 at 2:07 AM
jkirb.bsky.social
New tags:
#DeltaruneOC
#DeltaruneCh5Concept
December 9, 2025 at 5:56 PM
jkirb.bsky.social
Guys.... Undertale guys...
(6/8)
#DeltaruneSpoilers #DeltaruneCh5Concept #DeltaruneOC #Ralsei
Before a vine goes straight through her head. Then multiple. Oh… that's gore of my comfort character… So uh… She’s dead. It all fades to black.. “Tellie…..?” Ralsei suddenly hears movement, then a horrible insane laugh OMEGA FLOWEY FIGHT!!!!!!!! That’s right! OMEGA FLOWEY! (Can you tell I like Undertale?) This fight is very similar to the Omega Flowey fight in Undertale, but not as crazy as before. Unless? Well I think this is the final shadow crystal we need so… Also TELLIE ISN’T DEAD! In the Omega Flowey fight in Undertale, there are the sections where the souls help you out and heal you before putting you back in the fight again. With this one, Tellie uses her strength to help Ralsei out, to defeat Cyan Flowey! There is a pacifist and “genocide” route for this fight like in the other secret bosses. (Spamton and Jevil’s fight more specifically) In the pacifist, Ralsei uses his fire powers to burn the vines off Tellie, maybe burning the vines would give Tellie more control. (Cutting off her strings). Doing this would give you more opportunities to heal and make the battle easier and less chaotic. In the end, we get the “NO YOU’RE SUPPOSED TO OBEY ME” moment before Tellie gains full control. However, she doesn’t get to live :( She’s already so damaged, and there is no way of healing her, no matter how much Ralsei tries. Tellie says her last goodbye to Ralsei before she breaks apart. In the “Genocide” version, Ralsei uses his fire powers to attack Tellie directly. This version of the fight is more difficult and chaotic. Tellie also has less chances to heal you and help you out. Tellie gets a final moment in this one too. Ralsei apologizes to Tellie that he had to hurt her, but Tellie understands that it was the only way to stop them. She breaks apart.
December 8, 2025 at 6:16 PM