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Seible
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Seible

AKA Sei-chan Seibelle (female alter ego) Swablu (by Freodore) Ittan Sei (by Shu Yamino) Seible Jacob Nijisanji (by Kaelix Debonair) Seiburu-kun (by Kaelix Debonair) Buruburu (by Vezalius Bandage) Sekaible (NIJIENchanted) Seible Jugemu Jugemu Go-Kō-no-Surikire Kaijari-suigyo no Suigyō-matsu Unrai-matsu Fūrai-matsu Kū-Neru Tokoro ni Sumu Tokoro Yaburakōji no Burakōji Paipo Paipo Paipo no Shūringan Shūringan no Gūrindai Gūrindai no Ponpokopii no Ponpokonā no Chōkyūmei no Chōsuke Nijisanji Seible Deuteranopia Nijisanji Seiburunyan (by Zeal Ginjoka) Doctor Sei Watt (VCraft Enchanted) Jaff My Promoter (by Kaelix Debonair) Seible League of Legends Seibleague Seible John Jacobs (DistrictV)セイブルSei-chan
NIJISANJI EN Active
Twitter: 2025/03/13 YouTube: 2025/03/15
Debut Date
3 October
Birthday

About

No.1 Promoter of BY THE BEAT @NIJISANJI_World にじさんじEN所属！プロモーターのセイブルです！ ママ: @nana_tetra ! #Seible #Seiblue #NIJISANJI_EN #BYTHEBEAT

Character Info

Gender Male
Height 176 cm (5'9")
Birthday 3 October
Zodiac Sign Libra
Illustrator Nana Tetra

Community

Fan Name Seinyans
Languages English, Japanese
Genres gaming, free-talk
Oshi Mark / Emoji 💎👔

Tags

free talkgaming#seible#seeyoulive#seiblue#seiyouloveme#seilmysoul#thumbneible#clipeible#せいぶるみて

Recent Activity

Recent Tweets
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Introduction Video

Gallery

Seible
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Personality

Seible is a lively and bubbly person. In streams, he's shown to deeply care about his genmates while poking fun to get the group to chuckle.

Appearance

Seible has short light brown hair with blue and magenta/pink highlights. He also has purple eyes with diamond shaped pupils, and two beauty marks on the lower part of his right eye. On his left ear, his earrings has a crescent moon, a stud earring and a huggie earring. On his right ear he only has a segment ring. His casual clothes consist of a jacket that's blened in silver and white, while being surrounded by various blue jewelries and laces. He also has a black shirt which coincidentally matches the same color as his gloves, a blue tie with a diamond shaped designs colored in a black and purple. On his neck, he wears a black choker with a small chain on the right side and a small diamond on the front. and two silver necklaces with three crescent and a diamond. Lastly, he also wears white pants, and black loafers with blue socks.

Background

Seible's YouTube channel was created on 4 March 2025, and his Twitter in February 2025.

On 13 March 2025, NIJISANJI announced the 11th wave "BY THE BEAT" consisting of Seible, Zeal Ginjoka, Freodore, and Kaelix Debonair. Seible's first tweet was made on 13 March 2025.

Debut

On 15 March 2025, Seible debuted on his YouTube channel, and was the first member to debut.

Mascot and fans

  • Seible's fans are called Seinyans.
  • The Seinyans' fan chant is "nyan nyan".

Relationships

Trivia

  • Color: white
  • He is one of the first NIJISANJI EN members to debut without a surname along with Freodore.
  • He can speak both English and Japanese.
  • Similar to Freodore, he is also colorblind, albeit slightly.

Likes and dislikes

  • Likes: My Senpais, Tea & Honey, Arts & Crafts, Leather Goods, Shiny Objects, Singing and Voice Acting, Idols and Anime, Rain & Snow, Ramen, Sushi, and Pasta, You (only if you subscribe), Reading an Amazing Book
  • Other Likes: Pineapple on Pizza, Gumi, Takenoko -> Kinoko, Energy Drinks, Cookies & Cream Ice Cream.
  • Anime: Code Geass, Overload, D Gray Man, The Apothecary Diaries, Fullmetal Alchemist: Brotherhood, Summer Time Rendering, Death Note, Full Metal Panic! Fumoffu, Hunter x Hunter, Uramichi Onsen, Charlotte, 86, Demon Slayer: Kimetsu no Yaiba, Naruto
  • Games: Monster Hunter, Apex Legends, Marvel Rivals, Valorant, Animal Crossing, Left 4 Dead 2, Uno, Grand Chase, Ragnarok Online, Final Fantasy Series, Super Smash Bros Brawl, Pokemon, Mario Games, League of Legends
  • Dislikes: A Lonely Stage
  • Other Dislikes: Veggies, Old Elevators, &*&#$# on by a Cicada, Touching Grass, Going Outside, Direct Sunlight, Networking, Jumpscares, Fried Fish, Losing 1 sock in the laundry room on a random Tuesday.

Miscellaneous

  • His goals are singing on stage, voice acting, appearing on a billboard ad, having his own 1/7 inch figure, making lifelong friends, and contributing to a billion smiles and more.
  • He uses boku when referring to himself in Japanese.
  • Seible used to be a teacher.
  • He's currently the only By The Beat member that can drive and has a driving license.
  • He has an open water scuba diving license.
  • He has protanomaly, a form of red-green colorblindness.
  • He sees the pink in his hair as light blue but can see the vibrant pink in his tie.

More Info

Profile

A bubbly and magnetic Promoter who brings people together and adores attention.

2025

On 25 March, Seible reached 100,000 subscribers on his YouTube channel.

On 29 March, Seible opened his membership feature on his YouTube channel.

Quotes
  • "Welcome to opening night!" - Debut Trailer
  • "Nyao~" - Welcome Greeting
  • "I'm just a chill guy and I work here."
  • "This is a safe space. Sort of. Not really. I mean, it's like a somewhat safe space. I mean, there could be safer spaces, like in therapy or something."
  • "Okay, hear me out..."
  • "What? Who said that?!"
  • "Yeah! Tell 'em!"
  • "THAT'S CRAZY!"
  • "Har? Hanya?"
  • "Slow is fast, fast is slow"
  • "Slip a load in him but he said no :( cheese"

Media

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