- Actor Allusion: In the first drama CD, Licht talks about swimming and sounds a lot like Haru in the process. This may or may not be intentional.Licht: Its not that you want to be taught "some kind" of swimming. Its "what" you want to be taught. Its not "whatevers fine, I just want to swim". Its "what kind" of swimming you want!
- Hearing Mike McFarland as Belkia in the English dub is hilariously amusing, considering the fact that this isnt the first time hes voiced an antagonistic, over-the-top character who acts like a showman. Heck, he even uses the same voice he used for Buggy!
- All-Star Cast: The names are big enough in the main roles (Takuma Terashima, Yuuki Kaji, Tatsuhisa Suzuki, Yoshitsugu Matsuoka, Hiro Shimono, Yuki Ono, Nobunaga Shimazaki, and Ryohei Kimura, among others), but the secondary cast features giants like Hiroshi Kamiya, Daisuke Ono, Junichi Suwabe, and Ami Koshimizu.
- Ascended Fanon: While Word of God called Sakuya a yandere once, fandom tends to exaggerate that trait, portraying him as a stalker (which he isn't in canon; the only times he spies on Mahiru Tsubaki sent him). Fanon stalker Sakuya made it into a strip in Sleepy Life of Servamp, albeit Played for Laughs.
- Bleached Underpants: Before creating Servamp, Strike Tanaka used to create yaoi manga under a different name. The duo also used to draw doujinshi of other popular series.
- Cross-Dressing Voices: Played straight in the English dub where Michelle Rojas voiced Old Child, but averted in the original Japanese version where he is voiced by Ayumu Murase.
- The Danza: Hiroshi Kamiya as Tsurugi Kamiya.
- Fan Nickname: "Mamahiru" for Mahiru.
- Name's the Same: There's another Kamiya Tsurugi in Kurogane (2011).
- Playing Against Type:
- Yoshitsugu Matsuoka is usually known for playing fairly normal, down-to-earth Nice Guy characters. Berukia is anything but.
- While Yuuki Kaji has played lazy characters before, he's Playing Against Type in terms of vocal range - Kuro sounds deeper and older than most of his other roles.
- Most of Nobunaga Shimazaki's better-known roles are either nice guys or at least The Stoic. Licht? Not really.
- Relationship Voice Actor:
- Tsurugi and Yumi have already been arch-enemies in Ikebukuro, basketball rivals and former teammates, two brothers out of a group of identical sextuplets, a shrineless god and his friend's Shinki, and have killed titans together.
- Tetsu and Lawless have already been their respective basketball teams' aces, fellow mangaka assistants, and childhood friends.
- Mahiru, Berukia and Mikuni are the three competitors for the throne of Hell, and Tetsu is their unassuming classmate.
- Kuro is an energetic otaku, Mahiru drives him around Ikebukuro, Misono is the current leader of the Blue Squares, Tetsu leads a biker gang, and Lily has a crush on a Dullahan head. Tsurugi is also an information broker and Yumikage is his super-strong arch-enemy.
- Kuro, Hugh, Lawless and Shuuhei all meet in a volleyball training camp - as Kenma, Hinata, Bokuto, and Kageyama, respectively.
- Tsubaki and Licht are swimmers in a relay team.
- Talking to Himself: Yuuki Kaji in episode 9, of sorts. He also voices the creator of the Servamps in Kuro's flashback, probably because giving the creator a face or voice is impossible as neither is known yet, so Kuro is speaking for both as a kind of narrator, making this actually an In-Universe case of Talking to Himself.
- What Could Have Been: The Sleepy Life of Servamp Slice of Life Spin-Off revealed some of the characters' original designs. Mahiru originally had a cuter, more meek personality, Sakuya was missing his side curl but wearing a lot more accessories, and Kuro looked leagues more like a stereotypical vampire, had a different personality (and was capable of smiling), and looked prettier.
- The Wiki Rule: Here you go.
Trivia / Servamp