It is speculated that this series served as a heavy influence for Black Lilith's Taimanin franchise, which, like La Blue Girl, also involves female ninjas fighting demons with tentacles.
This series was originally going to get a UK release. However, due to the explicit nature of the show, it never happened, though previews for La Blue Girl can still be found on old UK VHS tapes. Despite that, the third season in the franchise, La Blue Girl Returns, did get released in the UK, interestingly enough, but of course, lot of scenes had to be censored in order for it to happen.
Miko Mido is a 16-year-old high-schooler in the original Japanese version.
Miko Mido (the star of the series) bears a striking resemblance to Megumi from Voltes V.
La Blue Girl allegedly served as inspiration for the popular Taimanin series.