8. Kurenai’s red lipstick is, in a way, a pun on her own name. The kanji for “Kurenai” can also be read as “beni”, which is a word used for red make-up used traditionally in Japan to colour the lips red.
7. Kurenai is the only one of the four principal sensei (Asuma, Kakashi, Guy, and herself) who doesn’t regularly wear a flak jacket.