A/N: If you're here, then you have some inkling of interest in the Akane no Mai (and its early draft stories: Persona Vein/Urban Legends) series. This list is the unofficial voice cast for this fic series. Yes, 'unofficial'. In other words, our 'headcanon' voices when reading off the character dialogue.
Have a look.
(2/5/23 update: More voice references and roars have been modified and added.)
Akane no Mai: Supplementary Material
Voice References
Perspective Characters
Hifumi Togo - Eden Riegel (EN), Tomomi Isomura (磯村 知美) (JP)
Skyler Jones - Chris Hackney (EN, Male Voice 7), Kengo Kawanishi (河西健吾) (JP)
Sion - Chris Hackney (EN, Male Voice 7), Kengo Kawanishi (河西健吾) (JP)
The Phantom Thieves
Ren Amamiya-Takamaki - Xander Mobus (EN), Jun Fukuyama (福山 潤) (JP)
Ann Amamiya-Takamaki - Erika Harlacher (EN), Nana Mizuki (水樹 奈々) (JP)
Morgana - Cassandra Lee Morris (EN), Ikue Ōtani (大谷 育江) (JP)
Makoto Niijima - Cherami Leigh (EN), Rina Satō (佐藤 利奈) (JP)
Ryuji Sakamoto - Max Mittelman (EN), Mamoru Miyano (宮野 真守) (JP)
Haru Okumura - Xanthe Huynh (EN), Haruka Tomatsu (戸松 遥) (JP)
Futaba Sakura - Erica Lindbeck (EN), Aoi Yūki (悠木 碧) (JP)
Yusuke Kitagawa - Matthew Mercer (EN), Tomokazu Sugita (杉田 智和) (JP)
Goro Akechi - Robbie Daymond (EN), Sōichirō Hoshi (保志 総一朗) (JP)
Sumire Yoshizawa - Laura Post (EN), Sora Amamiya (雨宮 天) (JP)
Arsène - Xander Mobus (EN), Jun Fukuyama (福山 潤) (JP)
The Vein Remnants
Io - Brina Palencia (EN), Lynn (りん) (JP)
Louis Amamiya - Max Mittelman (EN), Kaito Ishikawa (石川 界人) (JP)
Mia Karnstein - Erica Mendez (EN), Ai Kayano (茅野 愛衣) (JP)
Yakumo Shinonome - Robbie Daymond (EN), Kosuke Toriumi (鳥海 浩輔) (JP)
Jack Rutherford - Greg Chun (EN), Junichi Suwabe (諏訪部 順一) (JP)
Eva Roux - Bonnie Gordon (EN), Saori Hayami (早見 沙織) (JP)
The Spiritual Gamblers
Yumeko Jabami - Erika Harlacher (EN), Saori Hayami (早見 沙織) (JP)
Mary Saotome - Kira Buckland (EN), Minami Tanaka (田中 美海) (JP)
Ryōta Suzui - Griffin Burns (EN), Tatsuya Tokutake (JP)
Midari Ikishima - Sarah Anne Williams (EN), Mariya Ise (伊瀬 茉莉也) (JP)
Yuriko Nishinotōin - Cristina Vee (EN), Karin Nanami (奈波 果林) (JP)
Itsuki Sumeragi - Erica Mendez (EN), Yūki Wakai (若井 友希) (JP)
Yumemi Yumemite - Faye Mata (EN), Yū Serizawa (芹澤 優) (JP)
Runa Yomozuki - Kayli Mills (EN), Mayu Udono (鵜殿 麻由) (JP)
Kaede Manyūda - Chris Niosi (EN), Tomokazu Sugita (杉田 智和) (JP)
Terano Totobami - Jennifer Losi (EN), Megumi Han (潘 めぐみ) (JP)
Rei Batsubami - Laila Berzins (EN), Romi Park (朴 璐美) (JP)
Yumi Totobami - Corina Boettger (EN), Haruno Inoue (井上 遥乃) (JP)
Erimi Mushibami - Lizzie Freeman (EN), Ayana Taketatsu (竹達 彩奈) (JP)
Miyo Inbami - Maureen Price (EN), Yumi Uchiyama (内山 夕実) (JP)
Miri Yobami - Jeannie Tirado (EN), Rumi Ōkubo (大久保 瑠美) (JP)
Sumika Warakubami - Dorothy Elias-Fahn (EN), Ayahi Takagaki (高垣 彩陽) (JP)
Nozomi Komabami - Jeannie Tirado (EN), Sayaka Kitahara (北原沙弥香) (JP)
Miroslava Honebami - Allegra Clark (EN), Mitsuki Saiga (斎賀 みつき) (JP)
Ibara Obami - Joe Zieja (EN), Yoshimasa Hosoya (細谷 佳正) (JP)
Rin Obami - Zach Aguilar (EN), Akira Ishida (石田 彰) (JP)
Major Allies
Shinya Oda - Micah Solusod (EN), Miyu Irino (入野 自由) (JP) (Teenager); Barbara Goodson (EN), Aki Kanada (金田 アキ) (JP) (Child)
Nicola Karnstein - Justin Briner (EN), Kenshō Ono (小野 賢章) (JP) (Teenager); Michelle Ruff (EN), Hiromi Igarashi (五十嵐 裕美) (JP) (Child)
Reiko Hanami - Felecia Angelle (EN), Saori Hayami (早見 沙織) (JP)
Sojiro Sakura - Jamieson Price (EN), Jouji Nakata (中田 譲治) (JP)
Sae Niijima - Elizabeth Maxwell (EN), Yūko Kaida (甲斐田 裕子) (JP)
Karen Amamiya - Caitlin Glass (EN), Yumi Hara (原 由実) (JP)
Emily Su - Ashly Burch (EN), Yūki Kuwahara (桑原 由気) (JP)
Li-Ming Xiuying - Laura Bailey (EN), Manaka Iwami (石見 舞菜香) (JP)
Aurora Valentino - Veronica Taylor (EN), Arisa Sakuraba (櫻庭 有紗) (JP)
Anastasia - Bryn Apprill (EN), Ari Ozawa (小澤亜李) (JP)
Nadia - Elizabeth Maxwell (EN), Reina Ueda (上田 麗奈) (JP)
Takuto Maruki - Billy Kametz (EN) (pre-2022) and Stephen Fu (current), Satoshi Hino (日野 聡) (JP)
Sophia - Megan Taylor Harvey (EN), Misaki Kuno (久野 美咲) (JP)
Zenkichi Hasegawa - Tom Taylorson (EN), Shin-ichiro Miki (三木 眞一郎) (JP)
Akane Hasegawa - Colleen O'Shaughnessey (EN), Naomi Ōzora (大空 直美) (JP)
Kuon Ichinose - Kira Buckland (EN), Yōko Hikasa (日笠 陽子) (JP)
Akira Konoe - George Ackles (EN), Tōru Ōkawa (大川 透) (JP)
Joaquin Fujimura - Erik Davies (EN), Hikaru Midorikawa (緑川 光) (JP)
Lance - Ben Diskin
Cammy - Cristina Vee
Marty - Jesse McCartney
Andrea - Alyson Stoner
Tori - Erica Mendez
Hiroshi - Johnny Yong Bosch
Huey - Jason Liebrecht
Samantha - Annie Wood
Cassiel - Jim Sturgess
Sasha/Reapress - Karen Strassman
Kara - Colleen O'Shaughnessey
Ayana - Karen Dyer
Nioh-related Characters
Nekomata - Mugihito (麦人)
William - Ben Peel
Hattori Hanzo - Toshiyuki Morikawa (森川 智之)
Okatsu - Emi Takei (武井 咲)
Date Masamune - Hiroki Takahashi (高橋 広樹)
Sanada Yukimura - Shin-ichiro Miki (三木 眞一郎)
Lady Chacha (Yodogimi) - Atsuko Tanaka (田中 敦子)
Mina Hattori - Ali Hillis
Kyosuke Itoshii - Noshir Dalal
Oda Nobunaga - Kou Shibusawa (シブサワ・コウ)
Nōhime - Rie Tanaka (田中 理恵)
Yasuke - Richie Campbell
Giant Toad - Toshiyuki Morikawa (森川 智之)
Tokugawa Ieyasu - Masachika Ichimura (市村 正親)
Fuku - Risa Shimizu (清水 理沙)
Tenkai - Takayuki Sugō (菅生 隆之)
Tachibana Muneshige - Eiji Hanawa (花輪 英司)
Tachibana Ginchiyo - Shizuka Itō (伊藤 静)
Honda Tadakatsu - Tesshō Genda (玄田 哲章)
Senji Tome - Sayaka Kinoshita (木下紗華)
Shima Sakon - Keiji Fujiwara (藤原 啓治)
Ishida Mitsunari - Takahiro Sakurai (櫻井 孝宏)
Otani Yoshitsugu - Kenyu Horiuchi (堀内 賢雄)
Saika Magoichi - Yasuyuki Kase (加瀬 康之)
Date Shigezane - Joji Nakata (中田 譲治)
Sarutobi Sasuke - Junichi Suwabe (諏訪部 順一)
Toyotomi Hideyori - Makoto Furukawa (古川 慎)
Hide - Eiji Takeuchi (竹内 栄治)
Tokichiro - Naoto Takenaka (竹中 直人)
Mumyo - Haru (波瑠)
Hachisuka Koroku - Kenta Miyake (三宅 健太)
Hakutaku - Tohei Tadano (多田野 曜平)
Otakemaru - Hōchū Ōtsuka (大塚 芳忠)
Miyoshino/Suzuka - Kikuko Inoue (井上 喜久子)
Minamoto no Yoshitsune - Natsuki Hanae (花江 夏樹)
Abe no Seimei - Kengo Kawanishi (河西健吾)
Minamoto no Yorimitsu - Yūko Kaida (甲斐田 裕子)
The Shēngxiào
Blazing Basan - Brian Beacock
Storm Hebi - Melissa Fahn
Quake Inu - Dave Wittenberg
Aurora Tora - Johnny Yong Bosch
Virtus Ushi - Brad MacDonald
Invisible Nezumi - Steve Blum
Telepathic Uma - Bridget Hoffman
Healing Usagi - Peggy O'Neal
Lightspeed Yagi - Todd Haberkorn
Æther Tatsu - Steve Staley
Gluttonous Buta - Rebecca Forstadt
Shinrin Saru - Wendee Lee
Independent Antagonists
Seishin Kanashī - Robert McCollum (EN), Akira Ishida (石田 彰) (JP)
Yaldabaoth - David Lodge (EN), Masane Tsukayama (津嘉山正種) (JP)
Maria - Yolanda Kettle
Shadow Shido - Keith Silverstein (EN), Shūichi Ikeda (池田 秀一) (JP)
Shadow Kamoshida - D.C. Douglas (EN), Yūji Mitsuya (三ツ矢 雄二) (JP)
Shadow Madarame - Kyle Hebert (EN), Yukitoshi Hori (堀 之紀) (JP)
Shadow Kaneshiro - Jalen K. Cassell (EN), Takahiro Fujimoto (藤本 隆宏) (JP)
Shadow Okumura - Christopher Corey Smith (EN), Hirohiko Kakegawa (掛川 裕彦) (JP)
Shadow Sae - Elizabeth Maxwell (EN), Yūko Kaida (甲斐田 裕子) (JP)
Edward Kelley - Nicholas Boulton
John Dee - Timothy Watson
The Consortium
Gregorio Silva - D.C. Douglas (EN), Akio Ohtsuka (大塚 明夫) (JP)
Juzo Mido - Keith Silverstein (EN), Show Hayami (速水 奨) (JP)
Cruz Silva - Brina Palencia (EN), Lynn (りん) (JP)
Kirari Momobami - Michelle Ruff (EN), Miyuki Sawashiro (沢城 みゆき) (JP)
Sayaka Igarashi - Erica Lindbeck (EN), Ayaka Fukuhara (福原綾香) (JP)
Ririka Momobami - Michelle Ruff (EN), Miyuki Sawashiro (沢城 みゆき) (JP)
Eon the hoatzin - Andy Serkis
Miki Nakamura - Melissa Fahn (EN), Kuno Misaki (久野美咲) (JP)
Jocelyn Feles - Wendy Powell
Carolyn Angelsmith - Fryda Wolff
The Yami Matter
Yaban Mamushi - Chris Niosi
Beluga Ningyo - Sarah Williams
Giga Nihonzaru - Joshua Tomar
Zwei Ōkami - Xander Mobus
Kuchisake-onna- ?
Haruki/Stellar Ikeda - Jerry Jewell
Takumi/Tidal Kussharo - Josh Grelle
Aka Manto - ?
Hanako-san - ?
Cognitive Ann - Erika Harlacher (EN), Nana Mizuki (水樹 奈々) (JP)
Dracula - Roger Craig Smith (Base), Douglas Rye (Demon Form)
Empusa - Jennifer Hale
Lamia - Kari Wahlgren
Mormo - Megan Hollingshead
Ghost of Sanders - ?
Chochin-Obake - ?
Set - Carl Lumbly
Neurobuzz - James Patrick Stuart
Erinye - Carrie Keranen
Cambion - Annie Wood
Stolas - Ryan Kwanten
Black Hōō - Cristina Vee
Jinyo - Eden Riegel (EN), Tomomi Isomura (磯村 知美) (JP)
True Final Villain
Pandora (Persona 1) - Melissa Fahn (EN), Kuno Misaki (久野美咲) (JP)
Other Characters
Igor - Kirk Thornton (EN)
Lavenza - Carrie Keranen (EN), Aki Toyosaki (豊崎 愛生) (JP)
Sadayo Kawakami - Michelle Ruff (EN), Mai Fuchigami (渕上 舞) (JP)
Yuuki Mishima - Sean Chiplock (EN), Daisuke Sakaguchi (阪口 大助) (JP)
Shiho Suzui - Christine Marie Cabanos (EN), Akemi Satō (佐藤 朱美) (JP)
Miyako Tokiha - Terri Doty (EN), Kiyono Yasuno (安野 希世乃) (JP)
Eugene Lambert - David Vincent (EN), Yoshimasa Hosoya (細谷 佳正) (JP)
Hojo Fujita - Dave Trosko (EN), Yuichi Nakamura (中村 悠一) (JP)
Rin Murasame - Kira Buckland (EN), Yūki Takada (高田 憂希) (JP)
Davis - Kyle Hebert (EN), Shin'ya Takahashi (高橋 伸也) (JP)
Coco - Erica Lindbeck (EN), Nanako Mori (森 なな子) (JP)
Tae Takemi - Abby Trott (EN), Yuka Saitō (斉藤 佑圭) (JP)
Munehisa Iwai - Kaiji Tang (EN), Hisao Egawa (江川 央生) (JP)
Toranosuke Yoshida - William Salyers (EN), Keiichi Noda (JP)
Ichiko Ohya - Amanda Winn-Lee (EN), Yumi Uchiyama (内山 夕実) (JP)
Chihaya Mifune - Sarah Ann Williams (EN), Miyu Matsuki (松来 未祐) (JP)
Shūhei Hamada - Josh Grelle (EN), Shūhei Sakaguchi (阪口 周平) (JP)
Kimiko Watanabe - Kara Edwards (EN), Akeno Watanabe (渡辺 明乃) (JP)
Minami Takarada - Carli Mosier (EN), Minami Tsuda (津田 美波) (JP)
Tomoyuki Sakaguchi - Christopher Bevins (EN), Tomoyuki Higuchi (樋口 智透) (JP)
Mitsuyo Togo - Rinko Kikuchi (菊地 凛子)
Satoshi Togo - Ken Watanabe (渡辺 謙)
Dowdz's Crimson Characters
Akira Kurusu - Xander Mobus (EN), Jun Fukuyama (福山 潤) (JP)
Makoto Niijima - Cherami Leigh (EN), Rina Satō (佐藤 利奈) (JP)
Ryuji Sakamoto - Max Mittelman (EN), Mamoru Miyano (宮野 真守) (JP)
Ann Takamaki - Erika Harlacher (EN), Nana Mizuki (水樹 奈々) (JP)
Morgana - Cassandra Lee Morris (EN), Ikue Ōtani (大谷 育江) (JP)
Haru Okumura - Xanthe Huynh (EN), Haruka Tomatsu (戸松 遥) (JP)
Yusuke Kitagawa - Matthew Mercer (EN), Tomokazu Sugita (杉田 智和) (JP)
Sae Niijima - Elizabeth Maxwell (EN), Yūko Kaida (甲斐田 裕子) (JP)
Ichiko Ohya - Amanda Winn-Lee (EN), Yumi Uchiyama (内山 夕実) (JP)
Hideotoshi Kagawa - ?
Junichiro 'Juni' Maki - ?
Akio (Aki) - ?
Roars/Sound Effects
Raoul ΩX (Devil Hydra) - King Ghidorah (Godzilla: King of the Monsters)
Avaritia Mona - Nexu (Star Wars)
Ira Skull - Great Ape (Dragon Ball)
Gula Noir - Destoroyah (Godzilla)
Cavum Crow - Various Crow Sounds/Dragon Roars (The Elder Scrolls V: Skyrim)
Jack Rutherford (Successor of the Drake) - Spinosaurus (Jurassic Park III)
Yaban Mamushi (Snake Construct) - Basilisk (Harry Potter)
Zwei Ōkami - Various Wolf Sounds/Growls
Stellar Ikeda - King Ghidorah (Godzilla (Heisei)) and Boga the Varactyl (Star Wars)
Tidal Kussharo - King Ghidorah (Godzilla (Heisei)) and Boga the Varactyl (Star Wars)
Myrk Hedoro - Hedorah (Godzilla)
Sion (Successor of Julius Deinos) - Allosaurus (Jurassic World: Fallen Kingdom/Jurassic World Evolution/Battle at Big Rock)
Sekiken (Successor of Babylon Leo) - Various Lion Roars/Growls
Omusubi (Successor of Persian Ursine) - Various Wolf Roars/Growls
Mircalla (Successor of Alexandra Panthera) - Various Jaguar Roars/Growls
Beast of Gévaudan - Andrewsarchus (Walking with Beasts)
The Kyōchō - Velociraptors (Jurassic Park/World) and Deinonychus (Jurassic World Evolution)
Hermocrates the Zealous Ziz - Spinoraptor (Jurassic World Evolution)
Timaeus the Grappler Behemoth - Carcharodontosaurus (Jurassic World Evolution)
Critias the Abyss Leviathan - Suchomimus (Jurassic World Evolution)
Maltese Volans - Skullcrawker (Kong: Skull Island)
Agni Wadjet - Various Cobra Hissings/Screeches
Varanus Yemeni - Indoraptor (Jurassic World: Fallen Kingdom) and Indominus rex (Jurassic World)
Snapping Zaratan - Various Alligator Sounds/Roars
Mido (Successor of the Grand Beast) - SpaceGodzilla (Godzilla) and various phoenix sound effects
Yami Raoul ΩX (Devil Hydra) - King Ghidorah (Godzilla: King of the Monsters)
A/N: And there you have it. That's our voice cast list. Thoughts? Granted, not everyone has an official English voice yet or wasn't intended to have any to retain their Japanese authentic characters like in the case of the non-English characters in Nioh. The Nioh cast purely voiced by Japanese creates an interesting dichotomy between them and the English-voiced characters.
Nothing else to say.