Souei

Shadow Ninja of the Kijin Clan

Rimuru's direct retainer and Kijin ninja. Handles advanced espionage and assassination activities as a calm and composed tactician.

Quotes

  • True power shines in the shadows.
  • Silence is the greatest weapon.
  • Protect the world from unseen places.
  • Mission success is everything.
  • Loyalty is shown through actions, not words.

Trivia

  • He wears his mask only during combat and shows his face otherwise.
  • Voice actor Takuya Eguchi portrays him as a well-balanced character in offense and defense.
  • The original novel features detailed descriptions of his assassination techniques.
  • His ninjutsu talent stands out even among the Kijin.
  • One of the retainers Rimuru trusts the most.

Alternate names

Soei Shadow Assassin Kijin Ninja

Tags

That Time I Got Reincarnated as a Slime Souei Kijin Ninja Assassin Espionage Rimuru's Retainer Isekai Fantasy

Find Souei goods

Profile

Species
Kijin
Gender
Male

Appearance

Overall appearance
Wears black ninja attire with a mask covering half his face. Lean male with sharp eyes and flexible physical abilities.
Height
About 175cm
Eye color
Black
Hair color
Black
Distinguishing features
  • Half-hidden face
  • Black ninja attire
  • Sharp gaze
Iconic items
  • Ninja attire
  • Shuriken
  • Smoke bomb
  • Short sword
  • Mask

Personality and abilities

Core personality
Calm
Detailed personality
Does not show emotions outwardly, loyal and efficient in missions. Taciturn in interpersonal relationships but devoted to Rimuru and comrades.
Keywords
  • Calm
  • Loyal
  • Taciturn
  • Cautious
  • Intelligent
  • Stealth
Motto
Protect the light from within the shadows.
Talents
  • High physical abilities
  • Assassination techniques
  • Espionage activities
  • Infiltration
  • Information analysis
Skills
  • Ninjutsu
  • Shuriken technique
  • Stealth movement
  • Short sword combat
  • Disguise
Motivation
Protect Rimuru's world and ensure its stability. Protect comrades' safety from the shadows.
Habits
Often acts without words and shows little emotional expression. Always remains vigilant during missions.
Favorite colors
Black, Dark gray
Disliked situations
Pointless conflicts, Mission failures

History

Backstory
Raised as a Kijin ninja, swore loyalty to Rimuru. Handles all espionage and assassination missions in the other world, becoming one of Rimuru's most trusted retainers.
Debut date
October 2, 2018
Work title
That Time I Got Reincarnated as a Slime
Media type
Anime
Episode or chapter
Season 1 Episode 3

Pledge of Loyalty to Rimuru

Significant event
Pledge of Loyalty to Rimuru
Description
When Rimuru encountered the Kijin and welcomed them into his forces, he swore loyalty.

Successful Assassination Missions

Significant event
Successful Assassination Missions
Description
Accomplished numerous missions, contributing to the expansion of Rimuru's influence.

Retrieval of Critical Intelligence

Significant event
Retrieval of Critical Intelligence
Description
Retrieved intelligence from enemy forces multiple times, contributing to strategic decisions.

Relationships

Rimuru Tempest

Leader

Fought together under orders and swore loyalty.

Shuna

Comrade

Collaborated on multiple missions as fellow organization members.

Tempest Kingdom

Tempest Kingdom: strategist

Kijin Clan

Kijin Clan: leader

Media appearances

That Time I Got Reincarnated as a Slime

Anime / Supporting

2018 TV Series

That Time I Got Reincarnated as a Slime

Manga / Supporting

Ongoing

That Time I Got Reincarnated as a Slime: Scarlet Bond

Movie / Supporting

2022 Theatrical Release

Voice cast and creators

Takuya Eguchi

Voice actor
Takuya Eguchi
Language
Japanese
Version or series
TV Anime Version

Takuya Eguchi

Voice actor
Takuya Eguchi
Language
Japanese
Version or series
Theatrical Version

Fuse

Creator name
Fuse
Role
Original author

Mitz Vah

Creator name
Mitz Vah
Role
Character designer

8bit

Creator name
8bit
Role
Animation studio

Related goods

Souei 1/8 Scale Figure

Item name
Souei 1/8 Scale Figure
Category
Figure
Availability
Regular

Ninja Mask-Included Costume Set

Item name
Ninja Mask-Included Costume Set
Category
Apparel
Availability
Limited

Find Souei goods