- "Acheron" Charon
- "Alraune" Queen
- "Altar" Hakurei
- "Aquarius" Dégel
- "Aquarius" Mystoria
- "Aquarius" Tokisada
- "Aquila" Yuna
- "Aries" Kiki
- "Auriga" Capella
- "Auriga" Capella (Toei)
- "Balron" Lune
- "Basilisk" Sylphid
- "Bear" Geki (Toei)
- "Behemoth" Violate
- "Calamity" Ashe
- "Cancer" Deathtoll
- "Cancer" Manigoldo
- "Cancer" Schiller
- "Capricorn" El Cid
- "Capricorn" Ionia
- "Capricorn" Izo
- "Carina" Atlas
- "Centaurus" Babel (Toei)
- "Cepheus" Albior
- "Cerberus" Dante (Toei)
- "Chameleon" June (Toei)
- "Coma" Berenices
- "Crane" Yuzuriha
- "Crow" Jamian (Toei)
- "Crux" Christ
- "Dragon" Ryuho
- "Eagle" Marin (Toei)
- "Garuda" Aiacos
- "Garuda" Aiacos (Toei)
- "Garuda" Suikyo
- "Gemini" Aspros
- "Gemini" Cain / Abel
- "Gemini" Defteros
- "Gemini" Integra
- "Gemini" Kanon (Toei)
- "Gemini" Paradox
- "Gemini" Saga (Toei)
- "Golden Lion" Shiki
- "Griffon" Minos
- "Griffon" Minos (Toei)
- "Griffon" Vermeer
- "Harpy" Valentine
- "Hound" Asterion
- "Hydra" Ichi (Toei)
- "Leo" Kaiser
- "Leo" Mycenae
- "Leo" Regulus
- "Libra" Genbu
- "Lionet" Ban (Toei)
- "Lionet" Sōma
- "Lizard" Misty (Toei)
- "Lynx" Jaō
- "Lyra" Orpheus
- "Lyra" Orphée
- "Lyra" Orphée (Toei)
- "Mephistopheles" Yōma
- "Mermaid" Thetis
- "Mermaid" Thetis (Toei)
- "Midnight" / Nemuri Kayama
- "Minotaur" Gordon
- "Musca" Dio
- "Musca" Dio (Toei)
- "Ophiuchus" Odysseus
- "Ophiuchus" Shaina (Toei)
- "Orion" Eden
- "Orion" Jäger
- "Owl" Partita
- "Papillon" Myu
- "Papillon" Myu (Toei)
- "Perseus" Algol
- "Pink-chan" (Air Gear)
- "Pisces" Albafica
- "Pisces" Amor
- "Pisces" Cardinale
- "Sagitta" Maya
- "Sagittarius" Gestalt
- "Sagittarius" Sisyphus
- "Scorpio" Cardia
- "Scorpio" Ecarlate
- "Scorpio" Sonia
- "Scutum" Jan
- "Sphinx" Pharaoh
- "Taurus" Harbinger
- "Taurus" Hasgard
- "Taurus" Ox
- "Unicorn" Jabu (Toei)
- "Virgo" Asmita
- "Virgo" Fudō
- "Virgo" Shijima
- "Whale" Moses
- "Whale" Moses (Toei)
- "Wolf" Haruto
- "Wolf" Nachi (Toei)
- "Worm" Raimi
- "Wyvern" Rhadamanthys (Toei)
- 17 (Lapis)
- 18 (Lazuli)
- 25th Bam
- 2B (YoRHa No.2 Type B)
- 666:Satan
- 7th Floor Owner
- ??? (Mob Psycho 100)
- AM
- ANOTHER
- A (Shiei no Sona Nyl)
- Aang
- Aaron
- Aaron Woodsfield
- Aaroniero Arrureiri
- Abasalom
- Abe no Seimei (Nue)
- Abel
- Abhorrent Beast
- Abigail (Bastard!!)
- Abigail (Street Fighter)
- Abo-Kado
- Abraham Van Helsing (Hellsing)
- Abram Stoker
- Abraxas (Marvel Comics)
- Absolute Being
- Absolute Will
- Absolute Zero
- Absorption
- Abstract Entities (Marvel Comics)
- Abstract Existence
- Abyss Mage
- Abyss Watchers
- Abzu (Saint Seiya)
- Acausality
- Accelerator
- Accepted calcs
- Ace Ventura
- Acid Manipulation
- Acnologia
- Acupuncture
- Ada Wong
- Adalman
- Adam (Record of Ragnarok)
- Adam (Tokyo Babel)
- Adam (Yami To Boushi To Hon No Tabibito)
- Adam (Yami To Boushi To Hon No Tabibito Anime)
- Adam Archer
- Adam Blade
- Adam Taurus
- Adamaï (Wakfu)
- Adaptation
- Adele
- Adelheid Suzuki
- Adeliene
- Adeptus Astartes
- Adiane The Elegant
- Adolf K. Weismann
- Adon
- Aeon
- Afro Droid
- Afro Samurai (Character)
- Afterimages
- Age / Belcross
- Age Manipulation
- Aged Ape
- Ageha (GetBackers)
- Ageha Yoshina
- Agent (The Matrix)
- Agent Six
- Agi Ryuuhou
- Aging
- Agito/Lind
- Agumon (Digimon Adventure)
- Ahan Dan
- Aiber
- Aigami
- Aihara (Kisei Juui Suzune)
- Aika Sumeragi
- Aikawa Taeko
- Aiko Torasawa
- Aileen
- Aimaru
- Ainz Ooal Gown / Momonga
- Air Force One Angel
- Air Gear
- Air Gorilla
- Aisha Hario (Wire Girl)
- Aiwass
- Ajeel Ramal
- Ajimu Najimi
- Aka
- Akainu
- Akame
- Akane Owari
- Akane Sawatari
- Akane Shinjou
- Akari Hizamaru
- Akari Kuroki
- Akashic Records (Vampire Hunter D)
- Akatsuchi
- Akaza
- Akazome Kurou
- Akeginu
- Aki Hayakawa
- Akiko Aoshika
- Akira Fudou
- Akira Inugami
- Akira Kongoh
- Aku
- Akuma (Asura's Wrath)
- Akuma (Street Fighter)
- Akuma (Tekken)
- Akuto Sai
- Al Azif
- Al Simmons (Spawn)
- Aladdin
- Alan Blackman
- Albedo
- Albert Einstein (Super Science Friends)
- Albert Wesker
- Albinass
- Albion I
- Albion II
- Alcatraz
- Alchemy Glove Mira
- Alcina Dimitrescu
- Alcor Zeta Bud
- Aldia, Scholar of the First Sin
- Aldon Ski
- Aldoosi
- Aldoron
- Aldrich, Devourer of Gods
- Alduin
- Alecdora Sandler
- Aleister Crowley
- Alejandro
- Alex (Street Fighter)
- Alex (Tekken)
- Alex Louis Armstrong
- Alex Rex
- Alex Rossa
- Alexander Anderson
- Alexandrite (Steven Universe)
- Alexandros
- Alfaro
- Alfred, Hunter of Vilebloods
- Algol
- Algrim (Marvel Comics)
- Alibaba Saluja
- Alice (Resident Evil movies)
- Alice Garnet Nakata
- Alice Nakiri
- Alice Twilight
- Alicetaria February
- Alien Mother
- Alien X
- Aliens of Truth
- Alioth Epsilon Fenrir
- Alisa Bosconovitch
- Alita (2019 Live Action)
- All-Eyes Phantom Dragon
- All-Might
- All For One
- All You Need Is Kill
- Ally of Justice Decisive Armor
- Alma Tandoji
- Almalexia
- Aloy
- Alpha Nanite
- Alphamon
- Alphamon Ouryken
- Alphonse Elric
- Alphys
- Alpine Spaniel
- Alsheira Almonise
- Altair (Re:Creators)
- Alternates
- Alternative Weapon System (Bakugan)
- Alucard (Castlevania)
- Alucard (Hellsing)
- Alva Avan Edison
- Alvida
- Alzack Connell
- Amalia Sheran Sharm
- Amanda O'Neill
- Amatsu Mikaboshi (Marvel/616)
- Amber (RWBY)
- Amelia Will Tesla Saillune
- Ameri Kenzaki
- Amethyst (Steven Universe)
- Ameyuri Ringo
- Ami
- Amira
- Amirul
- Amon (Legend of Korra)
- Amon Koutarou
- Amon Natsuki
- Amulet Dragon
- Amygdala
- Ana (Gypsy)
- Ana (MOTHER)
- Ana Amari
- Anastasia (Brave 10)
- Anastasia Blast
- Anathar
- Ancient Fairy Dragon
- Ancient King
- Ancient Pixie Dragon
- Andras
- Andre Oscar
- Android 13
- Android 16
- Android 17 (Toei)
- Android 19
- Android 20 (Dr. Gero)
- Android 21
- Android 8
- Andromeda Shun
- AngeWomon
- Ange Ushiromiya
- Angel (King of Fighters)
- Angel (Tekken)
- Angel Blade
- Angel Devil
- Angel Physiology (Angelarium)
- Angel Physiology (High School DxD)
- Angel of Blades
- Angel of Fire
- Angel of Illusions
- Angel of Pressure
- Angel of Shadows
- Angel of Water
- Angel of Wind
- Angelarium
- Angelus (Drakengard)
- Angler Bird
- Angol Fear
- Angol Goa
- Angol Mois
- Angol Tia
- Anguirus
- Anilaza
- Animal Manipulation
- Animus (Fairy Tail)
- Anko Mitarashi