> For the complete documentation index, see [llms.txt](https://whitepaper.sleeplessailab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.sleeplessailab.com/ai-stars/arc-one.md).

# ARC//ONE

REN · RUI · KAI — the boy group.

<figure><img src="https://1767597917-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXwbGeIxUxDFEpLrVagyd%2Fuploads%2FTkMilHgZZd5Whm4Tv8dY%2Fgroup-arc.jpg?alt=media&amp;token=8b68381f-0798-4f6c-96a6-9dd95f10a566" alt="ARC//ONE — Sleepless AI character artwork"><figcaption><p>REN · RUI · KAI — the boy group.</p></figcaption></figure>

> The first arc begins.

ARC//ONE brings three different strengths to one stage. Leadership, melody and movement give the group its direction. The creative label Project HIM refers to this entertainment identity, not a guarantee of companion-product access.

## REN — The Director

**“I set the stage.”**

Three ambitions. One direction. REN is the group’s controlled, deliberate center: tousled black hair, a tailored dark suit and red details. His character is built around leadership and the discipline of making a performance work.

**Creative territory:** Leadership · Stage · Vision

## RUI — The Resonance

**“I make silence sing.”**

What words can’t hold, his music does. RUI is the vocalist and composer, recognized by soft silver hair and blue accents beneath a dark suit. His quieter presence carries a sharp artistic conviction.

**Creative territory:** Voice · Melody · Truth

## KAI — The Impact

**“Try to keep up.”**

Every beat hits harder when he moves. KAI brings a physical, competitive energy: close-cropped black hair, earrings and a sleeveless long coat. His world is rhythm and motion.

**Creative territory:** Rhythm · Motion · Fire

## Official introductions

[REN introduction](https://x.com/SleeplessAI_Lab/status/2089706985541587067) · [RUI introduction](https://x.com/SleeplessAI_Lab/status/2090973149705937196)

REN and RUI’s names and introduction order, and RUI’s vocalist/composer role, follow the official introductions. The profiles above describe the group’s creative identity; release announcements determine available experiences.