New ‘The Case Book of Arne’ trailer has Lynn obsessing over vampires right before she meets Arne
Steven Reynolds 
The Case Book of Arne trailer introduces a girl who gets way over-excited when it comes to the vampires she loves
There are so many amazing looking anime series dropping in early January, I am getting the feeling I may just be holed up for the better part of a week watching them all.
One of them, the mystery adventure series The Case Book of Arne released a main trailer today that introduces us to Lynn Reinweiß – the nobleman’s daughter who loves vampires so much she becomes a little bit over-excited when anywhere near one. (Yep, she’s a bit SCREAMY!!!) Even if it’s just a character in a film she’s watching.
But things are about to become even more interesting for Lynn as, after wandering into the strange city of Lügenberg one day, she meets Arne, a vampire who is known as being the “worst” in the city.
Arne, however, is a vampire detective and he needs some help in solving a murder case, which is why the pair soon find themselves buddying up and setting off to try to solve a bloody horrible mystery.
Yep, Lynn’s dream of being close to vampires has suddenly come true.
Lynn is voiced by Yuka Nukui (Kiyoko in Yano-kun’s Ordinary Days), while Arne is played by Kouki Uchiyama (Gen Narumi in Kaiju No. 8).
And no, while I’m not usually a fan of ultra-screamy anime girls, The Case Book of Arne does look fun, so I’ll give Lynn a fair shake when the anime releases on January 6th.
You never know, do you? She may calm down.
6 The Case Book of Arne cast members named
Along with The Case Book of Arne trailer, the anime’s X account also named six more cast members and their characters.
They are:
- Hiroshi Naka (Graham in Private Tutor to the Duke’s Daughter) is Gordon
- Reo Osanai (Loage in Farming Life in Another World) voices Diana
- Momoka Terasawa (Cecilie in Betrothed to My Sister’s Ex) plays Eliza
- Rikuya Yasuda (Marco in The Eminence in Shadow) as Bernd
- Yuto Uemura (Ryousuke in Anyway, I’m Falling in Love with You) voices Heinz
- Kakeru Hatano (Akihito in Wind Breaker) as Kai
A visual of all six cast members and their characters was also released via the official The Case Book of Arne X account earlier today.
The Case Book of Arne production details
The upcoming fantasy mystery anime is based on the adventure game of the same name (currently available via Steam). A manga adaptation has also been published in Japan.
The game’s anime adaptation is being directed by Keisuke Inoue (director of My Next Life as a Villainess: All Routes Lead to Doom!), with Keisuke Inoue also writing the anime in collaboration with the author of the manga Harumurasaki.
Akiko Sato (character designer for Betrothed to My Sister’s Ex) is both designing the characters and serving as Chief Animation Director.
SILVER LINK (Hokkaido Gals Are Super Adorable!) is animating.
The Case Book of Arne premieres on January 6th, 2026. Yep, in a jam-packed week of very cool looking anime series of a plethora of genres. Darn.
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