01Basic information

Japanese Name
セト神↗
Romanized Name
Seto-shin↗
Manga Debut
Chapter 205↗
Anime Debut
SC Episode 31↗
Game Debut
JoJo's Bizarre Adventure (SFC Game) | JoJo's Venture (Playable)↗

02Appearance

Sethan is bound to Alessi's shadow, taking its form but with a distinguished shape, the most prominent feature being its round head, a pointed crest, and large eyes. If the shadow is sideways, Sethan's cruel, jagged beak is revealed.↗↗

Its design is based on the opening of the Tetsujin 28-go anime, as well as the Nazca geoglyphs.↗↗

03Abilities

Sethan is a weak Stand with almost no offensive options, relying on its esoteric power to make its opponent weaker than Alessi. However, this alone makes it a terrifying opponent to face.↗

Shadow Reflection

Because Sethan takes on the form of Alessi's shadow, it imitates and replicates everything he does and has.↗↗

Because of this, any weapon Alessi holds is also held by Sethan, allowing it to attack the opponent with the shadow of the weapon. Moreover, the shadow can move independently from its possessor and even partially stick out of a surface to attack.↗↗↗

Age Reversal

Anyone standing in Alessi's shadow will age backward at a rapid speed. If a Stand user is de-aged to before they acquired their Stand like Jotaro, they will temporarily lose it.↗↗↗↗

The mind of the target also ages backward, leading their memories to progressively degrade into vague recollections of things they only knew as an adult (like names of friends or how to manifest a Stand).↗↗

If the user is knocked out, all the victims it affected will revert back to their original state.↗↗

04Plot details

SPOILERS

Abilities / Age Reversal

Polnareff, who touched it for a split second, ended up as an approximately 7 or 8-year-old child, while Malèna stood in it for ten seconds and was transformed into a helpless fetus that, without the connection to a womb, would have died within minutes.↗↗↗↗

05Appearances

Chapter 204: "Bastet" Mariah, Part 6 (Mentioned) Mentioned only↗

Chapter 205: "Sethan" Alessi, Part 1↗

Chapter 206: "Sethan" Alessi, Part 2↗

Chapter 207: "Sethan" Alessi, Part 3↗

Chapter 208: "Sethan" Alessi, Part 4↗

06Sources & attribution

Source text: JoJoWiki and its contributors. This entry has been reorganized and condensed for readability under CC BY-SA 4.0. Archived records reflect their capture dates. Referenced manga, anime, and artwork retain their respective copyrights.
Source bibliography (5)
  1. Chapter 205: "Sethan" Alessi, Part 1 Open ↗
  2. JOJOVELLER: Araki's Stand Commentaries - Sethan Open ↗
  3. Chapter 206: "Sethan" Alessi, Part 2 Open ↗
  4. Chapter 207: "Sethan" Alessi, Part 3 Open ↗
  5. Chapter 209: "Sethan" Alessi, Part 5 Open ↗

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