Lelouch: -Innocently- Really? I don't remember you complaining when we made it up to my room and…
Kallen: DO YOU WANT ME TO SHOOT YOU!? DO YOUREALLYWANT ME TO SHOOT YOU!?
Really, Lelouch seems to get a kick out of teasing Kallen. He does something similar in Chapter XX. While posing as a married couple in the Vermillion Forbidden Palace, Lelouch says that [he] loves her right. For a moment Kallen forgets that they're undercover and nearly stumbles over.
Kallen's reaction to Lelouch exercising in Chapter 19.
Inoue: Actually, I think Miss C.C. has good reason for having her knightmare painted that color. I mean, it's not like she has to worry about the Britannians picking her out, and getting shot down by a pink knightmare would only humiliate them further.
Rakshata: But it's humiliating to him as well! Being coated in such a horrid color! He's become transvestite!
Charles and Marianne lightly bickering over who Lelouch takes after more: his mother, or "the man who's waging a world war just to keep an audience occupied".