Case study · Fitness coach niche
53 reels.
One persona. One face.
Eden Brooks is the reference persona we built end-to-end to test every claim about AllUGC against reality. One face, two platforms, 53 published reels, 4.63% engagement rate, 30+ days of uninterrupted output, run by a single operator. Here's what we can show.
53
Reels shipped
30 IG + 23 YT
3,070
Total views
Across both platforms
4.63%
Engagement rate
(likes + comments) / views
$19
Lifetime API cost
OpenAI + fal + voice
The setup
One persona. Built once. Posted every day.
Eden Brooks is a 27-year-old fitness coach in the wellness + supplements niche. She doesn't exist. We built her once: five reference photos, a tuned voice profile, a 40-entry hook bank, a 7-day content pillar rotation (struggle / education / lifestyle / convert). Then the pipeline ran her daily.
Every video takes ~3 minutes to generate. AI picks the day's hook from the bank, writes the script aligned to the pillar, generates the still image with Eden's locked face, lip-syncs the voice to the visual. A quality gate scores the result against four dimensions and only the passing ones ship. The rest get re-rolled or dropped.
Then it auto-posts to her Instagram and her YouTube Shorts channel. The operator (Himanshu) checks the dashboard in the morning to see what landed. That's the whole workflow.
What shipped
Six of the 53.
Different hooks, different days in the rotation, same face every time. These are real public reels on Eden's actual accounts . click any to watch.
YouTube Shorts
“I'm 27, and my doctor said my iron was lower than my 65-year-old mom's.”
Instagram Reels
“Eden wipes face, looks at unopened collagen tub on desk.”
YouTube Shorts
“The 90-second routine I do before every shoot.”
Instagram Reels
“I stopped doing cardio for 6 months. Here's what changed.”
YouTube Shorts
“Three supplements I actually take (and three I don't).”
YouTube Shorts
“Your protein intake is wrong. Here's the math.”
The operator question
One operator. Daily output.
Eden's entire production runs end-to-end in roughly three minutes per finished reel that's idea generation, captioning, image rendering, lip-synced video, the quality gate, captioning + hashtags, and the auto-publish handoff. A single operator briefed the persona once, and 53 reels shipped on schedule from there.
For comparison: a real UGC creator at the bottom of the market takes 2 weeks of back-and-forth between brief and finished video. Eden runs continuously, with the same face every time, with no calendar gaps, with no creator availability windows to negotiate around. That's the operator delta.
The honest part
What we got wrong.
The IG container hang
Three weeks in, Instagram stopped processing Eden's uploads. They'd queue forever and never publish. Root cause turned out to be the metadata-strip step producing moov-at-end mp4 files. Meta's preprocessor needs moov at the front. Fixed with -movflags +faststart in ffmpeg. Six posts were lost to that bug before we caught it.
The YouTube refresh-token expiry
Google's OAuth app is in Testing mode, which silently expires refresh tokens every 7 days regardless of activity. We kept missing posts on the days after each weekly expiry. Either re-auth weekly until the Production verification process finishes (4-6 weeks), or eat the gap. Documented; not solved at the product level yet.
Engagement rate inflated by small sample
4.63% engagement on a 3,070-view base is high but not robust at this volume. The number we care about long-term is engagement rate at 50K+ cumulative views per persona. Eden's not there yet. The case-study claim is real but the math is fragile.
The system
One face. Four content pillars. A different feel every day.
We don't pick what Eden posts at random. The 7-day rotation balances vulnerability with conversion intent so the feed reads human, not robotic. Every persona in the system gets a variant of this.
Struggle
Monday + Thursday
Vulnerable. Relatable. Show the failure first.
Education
Tuesday + Friday
Teach one thing. One stat, one outcome. Save-worthy.
Lifestyle
Wednesday + Saturday
Aspirational. Day-in-the-life pacing. Aesthetic.
Convert
Sunday
One CTA. Soft pitch. Tied back to the week's struggle.
Next 30 days
Where this is heading.
Eden keeps running. The next milestones we're watching:
- → First Reel past 1,000 views (currently at 134).
- → First YouTube Short past 500 (currently at 282).
- → 100 cumulative posts (currently 53).
- →The follower-count number, which we'll publish when it's less embarrassing.
We'll update this page monthly with new numbers. The point isn't to prove Eden goes viral. Most personas won't. The point is to show what shipping daily, on brand, with one face actually looks like over a long enough timescale.
Your version of Eden.
Built in a week.
We're onboarding 5 teams at a time. Same playbook, same architecture, your face and your niche.