A set of seventeen (possibly eighteen) varied, generally antagonistic, very powerful and very bizarre looking alien beings in Neon Genesis Evangelion.
In real life they serve as monster of the week for the original animated TV series. Most of their designs are based in the original scary and very bizarre depictions of Angels in the Christian Bible. As the series progresses it is revealed that the Angels are artificially engineered lifeforms created by ancient intelligent alien beings to become the top dominating species in the different inhabited planets of our galaxy.