Gurren Lagann Concepts

An alternate reality is a universe that is different from the main world of a series. This world can be different in just small ways and it will still resemble the main reality, or it can be completely different and not be similar at all to the universe the protagonist had known.

One of the most common forms of fanservice in all anime. Bath scenes can show bonding between characters, but are more often used as just an excuse to exploit a female character.

A non-spiral species engineered to keep humanity living underground in small populations.

A group in Gurren Lagann made up of Kittan and his sisters. They have dedicated their lives to hunting down and overthrowing the beastman and call each other brother and sister, although it's unclear if they're actually related by blood.

The Bunny Girl is a fetish outfit made popular by the Playboy company though the meaning is different in Japan. A popular outfit in cosplay.

Like the Catgirl There's also a Catboy

Basically a short summary of past events told in one episode.

Fan Service is often a sexually provocative moment or pose that takes place in manga and anime. It usually has no real purpose to a story, and serves as a lurid visual.

Literally "combination" or "union," generally refers to the fusing of mechs.

The Gurren-dan (or Gurren Brigade) was formed by Kamina with the original goal of breaking through the surface from the underground.

Death of a major character.

A couple who have made an official vow to stay together.

A popular concept where a music artist makes a video to one of their chart topping songs.

The mystical power behind human evolution.

Those moments when clothing slips or falls off, revealing a little too much. During fights, this is usually considered "clothing damage" rather than a wardrobe malfunction.