I want you all to pay attention on her bag. It shows a reference to another anime/manga, called "Goldfish Warning". Both mangas/animes (BSSM and Goldfish Warning) were seen on a japanese magazine called "Nakayoshi".
Sailor Mars Transformation Wand
Rei Hino / Sailor Mars #SailorMoon
Sailor Mars/#1810148 - Zerochan
Sailor Moon Crystal poster series 3 featuring Sailor Mars