Deer are four hoofed grazing animals, with males possessing antlers.
- Deer were mentioned on Overlord: The Undead Oh! in a some gossip concerning Punitto Moe.
- Perytons are magical beasts cross between a deer and bird.
- One of Yamaiko’s Forest Friends is a deer plushie.
- In both the Overlord Web Novel and Light Novel, Arche Eeb Rile Furt upon seeing Ainz Ooal Gown's true powers reacted shaking like a newborn deer.