|Occupation:||Agent of the Dark Agency|
|Family:||Nyan-Nyan (sister), Wan-Wan (brother)|
|First Anime Appearance:||N/A|
|First Manga Appearance:||The Pet Stories Number 2: Wan-Wan's Plot!|
|First PGSM Appearance:||N/A|
Chuu-Chuu was a Codename: Sailor V-only character. She was the younger sister of Nyan-Nyan and Wan-Wan, and sought to get revenge on Sailor V for killing her siblings. The youngest of the animal-like siblings resembled a mosquito, and as part of her plans, she disguised herself as a doctor and tried to drain blood from everyone in Japan.