# The characters for Fujiwara literally mean "
Wisteria field", and Mokou "
Scarlet (younger) Sister". According to ZUN, however, Mokou can also mean "
Paint me red" and her name has no connection to Flandre Scarlet. In the right context, 'Kou' can also be translated as 'female phoenix bird', which is fitting, while 'Mo' can be translated as 'mourning' Her name would mean something similar to '
Mourning female Phoenix bird', a name somewhat fitting for her exiled life and events of her past.
# Considering Mokou's surname and her back story as a daughter of an aristocrat charmed by the Kaguya-hime of legend, she is supposed to be the daughter of Kuramochi no Miko (車æŒçš‡å), who was given the quest for the Jeweled Branch of Hourai by Kaguya. His model is speculated to be Fujiwara no Fuhito, the factual founder of the Fujiwara clan, a powerful clan of regents during the 9th to 13th centuries.
# Another note is at that time it was common for aristocrats to have "ã®" (pronounced no) between their surname and first name or their title and name. Thus the English equivalent of her name would be "Mokou of the Fujiwara Clan".
# Mokou appears on the cover of Imperishable Night, silhouetted against the moon beneath the silhouette of Kaguya.
# Mokou's character title is a pun on the title of ZUN's music CD, 蓬莱人形 ~ Dolls in Pseudo Paradise. She also uses a spellcard named Hourai Doll. Doesn't a certain someone else have a Hourai Doll too?
# The paper talismans on Mokou's pants and hair ribbons might be wards to protect them against being burned by fire. Her shirt, which lacks those talismans, appears to have been burnt repeatedly, while the ribbons and pants show no such wear.
# Because Mokou can't die, there are some parts of Gensokyo she cannot visit, such as Hakugyokurou. This is because being in the netherworld is equivalent to being dead, as quoted by Yuyuko in Perfect Cherry Blossom, and by Mokou in her confrontation with Yuyuko.
# The fact it took the combined efforts of her, Kaguya, and several rabbits to put out a forest fire in her
Bohemian Archive article implies that while she's capable of starting and increasing fire, she might not necessarily be able to extinguish it.
# In
Cage in Lunatic Runagate, she is shown as having had short, dark hair when she was mortal. No explanation of this is given.
# Chapter 11 of
Inaba of the Moon and Inaba of the Earth contains the first canonical depiction of a confrontation between Kaguya and Mokou. In it, they seem to have a danmaku fight with food.
# She seems to have a good relationship with the members of Eientei despite her feud with Kaguya and is willing to lead the rabbits home. She also seems to have a good relationship with Keine Kamishirasawa.
# In Canon, the Spellcard 199 in Imperishable Night might refer to
Iwakasa, as she implied she felt regret over causing his death.
# In the same Chapter in Cage in Lunatic Runagate: Chapter 4, it is shown that her immortality was derived indirectly from Iwakasa as well, as he saved her life prior to her immortality.
# Mokou was planned to be a playable character in
Hisoutensoku, but was scrapped due to a lack of time to balance her move set; ZUN stated in an interview she would have been overpowered and would unbalance the game (the same problem was encountered with plans to add Kaguya to the playable roster as well).
# Due to her power of resurrection and ability to control fire, Mokou is often depicted as having the same powers as the mythical phoenix (She even has spell cards called "
Possessed By Phoenix" and "Immortal Flying Bird Phoenix"), even occasionally generating what appears to be a phoenix-shaped aura. Fans like to depict this as "wings of fire", but in canon, she only controls the flames of the phoenix in her spells. The phoenix is probably more of an aura depicting her immortality.
# Fandom is divided as to whether or not Mokou actually is possessed by a phoenix; it would seem redundant, as she is already immortal (unless she did it to grow more powerful).
# Mokou is one of the few people in all of Gensokyo to wear pants. This, along with her somewhat forceful way of speaking, often leads to her being depicted as something of a tomboy (perhaps why her parents kept her out of public view). However, because conditions in Gensokyo still resemble those of feudal Japan, pants are hard to come by and must be made by a skilled tailor or imported from the outside world, and presumably are much more expensive than skirts. This may make pants a status symbol, and given Mokou's status as a daughter of the old Japanese aristocracy and her rugged lifestyle, it is likely it would be only natural for her to insist on wearing them.
# Because she claims to run a yakitori (grilled chicken skewers) stand, she is occasionally shown in fan works to be at odds with bird youkai Mystia Lorelei—or ironically, as a romantic interest. She has also used this occupation to scare Aya Shameimaru after insisting there was no fire in the bamboo forest.
# Fan works occasionally depict Mokou smoking because of her mentioning cigarettes in Bohemian Archive in Japanese Red.