TV series
After dying in a fight against the forces of evil, a knight found himself reincarnated as one of the most powerful monsters in the world: a behemoth! Problem is, he has to grow up before he can really strut his stuff, and a baby behemoth looks an awful lot like…a housecat?! And when an elf adventurer decides to take him in, she may need his help as much as he needs hers!
Streaming, rental and purchase options
Checked Sep 2, 2026
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After dying in a fight against the forces of evil, a knight found himself reincarnated as one of the most powerful monsters in the world: a behemoth! Problem is, he has to grow up before he can really strut his stuff, and a baby behemoth looks an awful lot like…a housecat?! And when an elf adventurer decides to take him in, she may need his help as much as he needs hers!
Choose an episode, then use the watch options above for the show.
Episode 1
A knight dies and is reincarnated into a baby Behemoth, an S-rank monster that looks just like a cat! A novice D-rank adventurer, Aria, adopts him as her kitty cat!
Guest stars Shou Okumura, Yasuhiro Mamiya, Naoko Nokubi, Yu Wakabayashi, Rei Ichinomiya, Natsune Inui
Episode 2
Aria and Tama visit the armor shop of their familiar blacksmith, Vulcan, to have Tama's armor tailored.
Guest stars Rei Ichinomiya, Natsune Inui, Anri Tanaka, Masashi Yamane, Tadaaki Doi, Yuka Iwahashi, Sae Hiratsuka
Episode 3
Disappearances plague the neighboring town of Lenard and the demon, Beryl, is behind it all. Aria accepts a quest to save the people in trouble.
Guest stars Daiki Hamano, Junichi Yanagita, Kanato Watai, Kazuyuki Okitsu, Takayuki Miyamoto, Takeo Otsuka, Naoya Nosaka, Kiyono Yasuno
Episode 4
Tama takes on the earth dragon, his fated enemy, in order to save Aria from the brink of death. Tama turns into a real behemoth!
Guest stars Daiki Hamano, Junichi Yanagita, Takeo Otsuka, Kiyono Yasuno, Nao Toyama, Ayako Kawasumi, Naoya Nakanishi, Rikuto Sunaga
Episode 5
Stella continues making passes at Tama with her telepathic skills. Meanwhile, Tama feels uneasy as he watches her fight, driven by her old earth dragon instincts.
Guest stars Kaito Tsuru, Masayuki Sato, Shoma Uno, Hiroshi Naka
Episode 6
The group is caught up in a new forest labyrinth. Tama and Aria are excited to explore an untouched earth said to be full of rare materials and rarer treasure chest.
Guest stars Yu Wakabayashi, Hiroshi Naka
Episode 7
Aria and friends desperately search for Lily and Feri. According to Vulcan, the Earl of Gladstone is rumored to be kidnapping young, beautiful women.
Guest stars Chika Kagawa, Hiroshi Naka, Miyuki Hara, Shinya Takahashi, Tadaaki Doi, Takayuki Miyamoto
Episode 8
Lily and Feri join Aria's party. Aria is rewarded with a promotion to A-Rank Adventurer! Meanwhile, Tama unlocks the ability to evolve into his third behemoth form.
Guest stars Shunsaku Nishigaki, Miyuki Sakurai, Rika Ikura, Kousuke Kiminarita, Kanato Watai
Episode 9
By invitation of the emperor, Aria and company travel to the imperial city of Klareal. There they meet legendary hero Prince Julius and the Holy Demoness Belzebuth.
Guest stars Kazuyuki Okitsu, Yuuki Hoshi, Yuka Iguchi, Ryuichi Kijima, Issei Futamata
Episode 10
With news that one of the Demonic Four has returned to the labyrinth in Ruine, Aria's party, Julius, and Cedric's knights make way for its deepest depths.
Guest stars Junichi Yanagita, Nao Toyama, Yuka Iguchi, Hina Suzuki, Yuki Onodera, Takehito Koyasu
Episode 11
After escaping to the demon world, Vasaago's next stop is Aria's birthplace: Lumines. His target? The Philosopher's Stone.
Guest stars Kiyono Yasuno, Ayako Kawasumi, Tomohiro Ono, Takehito Koyasu, Sayaka Kikuchi, Mikoto Nakai, Hiromichi Tezuka, Aoi Inase
Episode 12
The battle against Vasaago for the fate of the world has begun. Tama evolves into his third behemoth form and takes to the skies with Aria to retaliate!
Where to watch Beheneko: The Elf-Girl's Cat Is Secretly an S-Ranked Monster!Episode information updated Sep 18, 2026
Hinaki YanoAria (voice)
Tasuku HatanakaTama (voice)
Hitomi UedaStella (voice)
Tomori KusunokiVulcan (voice)
Yuu WakuiFeri (voice)
Nonoka ObuchiLily (voice)
Maaya UchidaAlisha (voice)
Nobuyuki HiyamaArnaldo (voice)
Tokyo MXJapan
Sun TVJapan
Zero-GJapan
Hakuhodo DY Music & PicturesJapan
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