Gemini · May 29
Bleach · 5th Division
Sosuke Aizen: zodiac sign and birth chart
Sosuke Aizen is a Gemini, born on May 29. Canon never gives a year, and NEBO's model finds no clear sign in the rest of his chart. Gemini fits the soft-spoken captain in glasses: a quick, charming mind that is always a few moves ahead of the room.
- SunGemini
SourceBirthday: the official character book SOULS. Canon gives no birth year, so only the Sun is canon. NEBO's model has no strong pick for the other placements.
Birth chart
Aizen's chart at a glance
Sun from the canon birthday. Canon gives no year, so the rest is NEBO's take from his character.
- Fire0
- Earth0
- Air1
- Water0
- No single element runs his chart. 1 air.
- About 1 in 43 birthdays get Aizen in the app's Bleach world.
- Other Geminis here: Momo Hinamori.
NEBO's take
Canon says Gemini. Our model has no strong pick.
We ran Aizen through the same model that matches people to characters in the app, and looked at which chart gets him most often. It finds no sign that clearly wins in any placement, which suits a man whose chart, like his face, gives nothing away.
Canon
Gemini SunMay 29, from the official character book. No year givenNEBO's take
No clear pickRead from his personality- Sun
CanonGeminiNEBO's takeNo clear pick
Canon's Gemini is the charmer: a gentle voice, glasses and a kind word for everyone in the Seireitei.
- Moon
CanonNo birth yearNEBO's takeNo clear pick
Canon gives no year, and the model has no clear pick, so the Moon stays open. Whatever he feels, it never reaches his face.
- Rising
CanonNo birth timeNEBO's takeNo clear pick
No birth time in canon, and no clear model pick. First impression anyway: calm, polite, glasses, and a smile that makes the room relax.
- Mercury
CanonNo birth yearNEBO's takeNo clear pick
No clear pick for Mercury. He speaks softly, and everyone leans in to listen.
- Venus
CanonNo birth yearNEBO's takeNo clear pick
No clear pick for Venus. He is easy to like, and that is the point.
- Mars
CanonNo birth yearNEBO's takeNo clear pick
No clear pick for Mars. He rarely raises his voice and almost never his sword, until it matters.
Where we agree: not much to argue about. Gemini is the sign of the quick, charming mind that is always playing a role.
How he shows up
Why he's like this
Gemini is the sign of the quick mind, the charm and the two sides to every story. Aizen hits all of it, with a smile.
CoreGemini Sun
The nicest face in the Gotei
Captain Aizen is introduced as the gentle leader of the 5th Division, polite to everyone, and his lieutenant Momo Hinamori thinks he is the best man in the Seireitei.
Soul Society arc
CoreGemini Sun
Two faces, one mask
It turns out the kindest captain faked his own death and manipulated the whole Seireitei for over a century. The gentle voice was the plan all along.
Soul Society arc · spoiler
CoreGemini Sun
Rewrites what you see
Kyoka Suigetsu is complete hypnosis: anyone who has seen the Shikai even once perceives reality however Aizen wants.
Soul Society arc · spoiler
CoreGemini Sun
A plan with a throne in it
He builds an army of Arrancar and dreams of overthrowing the Soul King to sit on the heavenly throne himself. Ichigo eventually defeats him, and Urahara seals him for 18,800 years.
Fake Karakura Town arc · spoiler
Your turn
Which Bleach character are you?
Pick your birthday. Your Sun sign gives a first answer right here, then the app reads your whole chart.
Aries girls get Riruka Dokugamine most often. Aries guys get Grimmjow Jaegerjaquez.
You and Aizen: Signs that cheer each other on. Good team.
Taurus girls get Nemu Kurotsuchi most often. Taurus guys get Byakuya Kuchiki.
You and Aizen: Next-door signs. Different instincts, lots to learn.
Gemini girls get Yoruichi Shihoin most often. Gemini guys get Shinji Hirako.
You and Aizen: Same sign. You'd get each other without trying.
Cancer girls get Orihime Inoue most often. Cancer guys get Ichigo Kurosaki.
You and Aizen: Next-door signs. Different instincts, lots to learn.
Leo girls get Tier Harribel most often. Leo guys get Don Kanonji.
You and Aizen: Signs that cheer each other on. Good team.
Virgo girls get Lisa Yadomaru most often. Virgo guys get Uryu Ishida.
You and Aizen: Signs at a right angle. Friction, the useful kind.
Libra girls get Yoruichi Shihoin most often. Libra guys get Toshiro Hitsugaya.
You and Aizen: Same element, air. Easy chemistry, same pace.
Scorpio girls get Orihime Inoue most often. Scorpio guys get Ichigo Kurosaki.
You and Aizen: Signs that speak different languages. Curious mix.
Sagittarius girls get Hiyori Sarugaki most often. Sagittarius guys get Kenpachi Zaraki.
You and Aizen: Opposite signs. You see each other's blind spot.
Capricorn girls get Nemu Kurotsuchi most often. Capricorn guys get Byakuya Kuchiki.
You and Aizen: Signs that speak different languages. Curious mix.
Aquarius girls get Soi Fon most often. Aquarius guys get Kaname Tosen.
You and Aizen: Same element, air. Easy chemistry, same pace.
Pisces girls get Orihime Inoue most often. Pisces guys get Shunsui Kyoraku.
You and Aizen: Signs at a right angle. Friction, the useful kind.
That's your Sun sign talking. The app reads your Moon, Venus, Mars and the rest, and the answer can change.
Get my real Bleach character→Chemistry
Who Aizen clicks with, and who he clashes with
Read from the charts on their pages. The plot may disagree.
Clicks with
- Rangiku MatsumotoGemini Sun+Libra SunSuns in the same element: they want the same things and go after them the same way.
- Genryusai YamamotoGemini Sun+Aries MoonSun and Moon in friendly signs: they bring out each other's good side.
- Soi FonGemini Sun+Aquarius SunSuns in the same element: they want the same things and go after them the same way.
Pick a side
Are you more Aizen or Ichigo?
Your birthday settles it. The app reads your whole chart and tells you who you really get.
Similar charts
Who else has Aizen's chart
Aizen in real life
The app casts Ice Cube (Gemini Sun) as Aizen so far, the same sign as canon.
Bleach
Characters like Aizen
Closest charts first: shared signs, same elements.
Which Bleach character are you?
Add your birthday and the app finds your Bleach character, your division and how close you are to Aizen.
Are you Aizen? Find your character→Questions
Aizen's zodiac sign: what people ask
What zodiac sign is Sosuke Aizen?
Gemini. The official character book gives Aizen's birthday as May 29, and Gemini runs from May 21 to June 20.
When is Aizen's birthday?
May 29. Canon never gives his birth year, so his full birth chart can't be calculated.
Is Aizen a Gemini?
Yes, by his canon birthday. The quick, charming mind that always plays the right role fits.
What is Aizen's Moon sign?
Unknown in canon, because his birth year is never given. NEBO's model also finds no clear pick for his Moon.
What is Aizen's birth chart?
Sun in Gemini, from canon. Canon gives no year and no birth time, and NEBO's model has no clear pick for the other placements, so we show the Sun alone.
What element is Aizen?
Air. Gemini is an air sign.
Who is Aizen most compatible with?
By chart, Rangiku Matsumoto, Genryusai Yamamoto and Soi Fon. Gemini Sun and Libra Sun: they want the same things and go after them the same way.
Unofficial fan page. Bleach and its characters belong to their respective owners. NEBO is for entertainment.
NEBO is for entertainment and self-reflection, not medical, psychological or financial advice.
TermsPrivacyImpressumCelebrity birth chartsZodiac signsFandom charactersZodiac compatibility2027 HoroscopeCelebrity birthdays© 2026 NEBO LABS LLC