I stumbled over this scene from Tengen Toppa Gurren Lagann (EP6) again and realized it contains a lot more references than I initially realized.
The bunny girls seem to reference characters from other Gainax shows. I recgonize some of them as listed below, but for some I have no idea. I'm also not sure which ones are references at all and which ones are just generic; maybe I labelled too many. The labels are consistent over all pictures.
- Nono (Diebuster)
- Asuka (Neon Genesis Evangelion)
- Lal'C (Diebuster)
- Mahoro (Mahoromatic) thanks ʞɹɐzǝɹ and Jon Lin
- Rei (Neon Genesis Evangelion)
- Probably Anna (He is my master) thanks Jon Lin
- Aki (Abenobashi) thanks ʞɹɐzǝɹ and Jon Lin
- Reiko (Gunbuster) thanks Jon Lin
- Jung (Gunbuster)
- Misato (Neon Genesis Evangelion)
- Maybe Owner (Ebichu) or Yukino (His and Her Circumstances) thanks Jon Lin
- A second Jung?
- Maybe Izumi (He is my master) or Miyuki (Mahoromatic) thanks Jon Lin