Scientists have long attempted to understand the fangirl, though most studies were abandoned due to emotional instability following fictional character deaths. But what they have discovered is that there are different subspecies of fan girls. There are the fans, the level-head (or secretly crazy) fan girls, the crazy fan girls, and the unhinged fans. For research purposes I will use fandom environments for examples. Keep in mind that some subspecies might have characteristics of other subspecies, but they still may be another one. Some might even be two or more different types of fangirls.
First we observe the fan. This species is often new to a fandom or is able to somehow maintain a regular life. While they enjoy the content, their survival does not depend on the love triangles and the hope of a truly questionable film adaptation. This is the least chaotic of the fangirls. We stumble upon a fan in their natural habitat. She enjoys the fandom, but somewhat unrealistically, does not produce mating calls based upon it.
Next we observe the level-headed fan girls, or the LHF. At first glance she may seem like an ordinary person or a regular fan at best. However, closer inspection of her sleeping area may be decorated with posters. You might hear her say something unusual. This is a reference to her most recent obsession. Subtle behaviors may include unexpected or unexplained emotional meltdowns when a favorite couple breaks up.
Observers are advised not to watch film adaptations of books with LHF present, as she will quietly explain everything the film portrayed incorrectly. LHFs may be spotted migrating to Barnes & Noble, attempting to spend all available currency and more. They communicate using coded vocalizations to locate one another, most notably: “Did you put your name in the Goblet of Fire?” followed immediately by the distressed response, “He said calmly!” Despite these behaviors, LHFs are highly skilled at blending in, making identification difficult for the untrained eye. One of these species’ biggest desires is finding a fan boy. The LHF may also be caught using one of its defense mechanisms, arguing online.
The next species is far easier to identify: the Crazy Fan Girl, or CF. The CF produces highly recognizable vocalizations and may visibly display fandom allegiance through clothing or accessories. We observe a particular CF, designated M. M’s most recent fixation is K-Pop Demon Hunters. She carefully draws each character during her free time and, when unaccounted for, is likely rewatching the movie for the millionth time. When you watch a film with the CF, she will not want to watch anything else.
The CF’s watching habits may cause nearby LHF mild distress. CFs and LHFs do not migrate together. When a new fandom is discovered (usually by another fan) the previous one is quickly forgotten. Observers will find relief during the CF’s transitional phases. The CF will most likely lose interest in a fandom within approximately two years.
Lastly we observe, from a safe distance, the Unhinged Fans or the UHF. Direct interaction is not suggested. UHFs are frequently seen draining financial resources on elaborate cosplay and merchandise. They may travel significant distances in pursuit of celebrity sightings, hoping for photos, autographs, or meaningful eye contact. This is widely considered the most intimidating species.
It remains unclear whether these species can be cured, or if they simply await the next release date.