Why is Kaguya depicted with a flower growing out of her head when in her moron/fool form?


In season 2 episode 2 of _Kaguya-sama wa Kokurasetai_ ("Kaguya-sama: Love is
War"), in the second skit titled _Kaguya-sama wa Okuritai_ ("Kaguya Wants to
Give a Gift"), Shinomiya Kaguya has a huge birthday cake prepared for the
student council president Shirogane Miyuki. Overwhelmed by her feelings for
the president in anticipation of celebrating his birthday together, Kaguya's
usual personas gave way to her "moron form", in which she is not at all
calculative and is very open to her feelings for the president.

In this form, Kaguya also has a pink flower growing out of the top right side
of her head:

> [![Kaguya in her moron form with a flower growing out of her head -
> 1](https://i.stack.imgur.com/n1FdSl.png)](https://i.stack.imgur.com/n1FdSl.png)
> [![Kaguya in her moron form with a flower growing out of her head -
> 2](https://i.stack.imgur.com/PkA2S.png)](https://i.stack.imgur.com/PkA2S.png)

Is there any significance to the flower growing out of Kaguya's head in this
visual representation of her mental state? Are there any other instances of
anime/manga characters having flowers growing out of their heads to indicate a
simple/idiot state of mind?




There is a Japanese term [脳内お花畑 ( _nōnai o-hanabatake_
)](https://www.japandict.com/%E8%84%B3%E5%86%85%E3%81%8A%E8%8A%B1%E7%95%91)
which translates literally to "garden in the brain". It's meant to indicate
someone who is "off in their own world" or spacing out, so not thinking
straight or not thinking at all.

