How to use Image 2.5 and Computer Use to create LINE stickers
The author describes using the newly released Image 2.5 model to generate a 40‑sticker set featuring the character Rokesta‑kun. Image 2.5 produced consistent two‑headed characters, something earlier models could not achieve, allowing the creator to finish a year‑long project. The workflow is further streamlined by the "Computer Use" feature added to the desktop versions of ChatGPT and Claude,…
What you can do with it
AI at Work →automatically fills LINE Creators Market submission forms with generated images
- Who for
- founders and online shops
- Cost
- free
- Effort
- minutes
Use it for
- generate sticker images
- auto‑populate submission forms
- publish stickers on LINE
Watch out requires desktop versions of ChatGPT or Claude; not available on mobile
Key points from the news
- Image 2.5 enabled generation of consistent two‑headed characters for a 40‑sticker set.
- Computer Use in desktop ChatGPT and Claude can auto‑fill LINE Creators Market forms.
- Apple may reject apps that name third‑party IP; removing the name helped approval.
The piece also shares a cautionary tip from an Apple‑review experience: apps that explicitly name third‑party IP, such as CryptoNinja, may be rejected. Removing the IP name from the app description led to approval on the first try. The author emphasizes that AI‑driven tools have lowered the barrier for individual creators, but advises staying mindful of platform policies and not chasing every new technology too quickly.
How to Create LINE Stickers with AI and Tips to Avoid Apple Review Rejection
note.com · 20 September 2026
Hello, this is Shirai.
Are you still living life on your own terms today?
The world is currently in the middle of the Silver Week long holiday.
I imagine many people are going on trips or leisure activities during this extended break, but as for me, I'm taking this opportunity to stay indoors and work like a demon on my personal projects.
Yesterday, on the first day of the holiday, I submitted applications for LINE themes and stickers one after another.
The horror of people who use LINE with the 'default settings'
The theme I submitted this time was designed by turning my NFT, 'Shirai and Milp,' into chibi characters using AI.
By the way, do you all have your LINE themes set up?
I usually rotate between the official Crayon Shin-chan and Dr. Slump themes depending on my mood.
I just love that unique, laid-back atmosphere.
However, there are some people in this world who continue to use the default settings (the gray silhouette icon) for everything, not just their themes, but even their profile icon images.
Honestly, isn't that incredibly scary?
I can't help but jump to conclusions, wondering if they have something to hide or if they're involved in the underworld, and it sends a chill down my spine (I am aware that this is a terrible prejudice).
Just customizing your smartphone screen a little can change your mood, so if the gentle-style theme I made this time is released successfully, please give it a try.
If you're still using the default settings, please take this opportunity to make your theme debut!
A revenge project a year in the making, and automation via Computer Use
For the LINE stickers, I also created and submitted multiple sets at once.
The highlight is a 40-sticker set featuring Kensu-san's character, 'Rokesta-kun'.
Kensu-san made a generous declaration saying, 'Anyone is free to make Rokesta-kun stickers, and you can keep all the proceeds,' so I took him up on his offer and made them.
Actually, I tried to make these stickers exactly a year ago, but the image generation AI at the time couldn't maintain character consistency, so I couldn't achieve the quality I was satisfied with and ended up shelving the project.
When I tried using the recently released "Image 2.5," I was able to generate two-headed characters exactly as I had imagined, which was surprising, and I was finally able to achieve my revenge after a year.
Furthermore, I also created stickers for an acquaintance's NFT character, "Usao," and for "Hiroyuki-san," who had an official event being held.
Recently, thanks to the "Computer Use" feature being added to the desktop versions of ChatGPT and Claude, once you create the images, the AI can even automatically handle the tedious task of filling out the application forms for the LINE Creators Market for you.
Compared to a year ago, the barrier to entry for individual creators has dropped to an unbelievable level.
The story of how even the "original creator" was rejected by Apple's review
And there was another piece of happy progress.
The educational app for preschoolers based on CryptoNinja, which I had been developing for quite a long time, finally passed Apple's review.
This brings the total number of apps I have submitted to nine.
However, this educational app was rejected by the App Store review three or four times, and it was truly a struggle.
The issue was the guideline regarding "third-party intellectual property rights (IP infringement)."
I kept getting rejected because they suspected, "Do you really have official permission to use CryptoNinja?"
At my wit's end, I consulted with the IP founder, Ikehaya-san, via DM, and a shocking fact came to light.
It turns out that when Ikehaya-san himself submitted an app he developed alone, he was also rejected by Apple because they suspected, "Do you hold the rights to CryptoNinja?"
It is an absurd drama unique to a massive platform where the creator themselves is treated as a fake and rejected (laughs).
Ikehaya-san advised me, "It is easier to get approved if you don't explicitly state 'CryptoNinja' in the app name or description," and when I followed that advice and removed the mention, it was approved on the first try as if it were a lie.
If you want to create derivative apps for CryptoNinja in the future, please keep this lesson in mind when you submit your application.
Feeling dizzy from the wave of real-time generative AI
Both the app and the stickers took shape, making for a smooth start to the first day of the long weekend.
However, looking at my X timeline, the latest AI technology called Jev, which uses a probabilistic model (?) to generate game stages in real-time, is buzzing, and the speed of evolution is enough to make me feel dizzy.
I have only just started touching simple 3D in Blender, but the wave of technology is relentlessly moving forward.
Trying to chase everything will just fry your brain, so I want to take it slow, go at my own pace, and release what I can create one by one.
Summary
- The evolution of image generation AI and Computer Use has dramatically lowered the barrier to entry for creating LINE stickers
- Apple's strict IP review can even reject the original creator, so be very careful with metadata entries
- In this era of rapid AI evolution, it is important not to be swayed by the speed of others and to keep working at your own pace
Whether you are working or taking time off, I hope you have a great Silver Week.
See you next time!
Please follow and subscribe to my Substack!
Take care!
🎧 Listen to the audio here 🎧
🌟 LINE stickers now on sale 🌟
📖 Book Curation Media 📖
This text was published by note.com and written by しらい. It is reproduced here with attribution so you can read it in full; the rights remain with the publisher. Read it at the source ↗
The headline, key points and digest above were generated by Digest AI's editorial model from the linked sources. Automated summaries can contain errors: the sources are the record. Spotted a mistake? Tell us.
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