Aside from the obvious things, this series is famous for its memorable quotes.
"Kill one person and you're a murderer. Kill a hundred and you will be a hero. Kill all humanity and you will be a God."
—Sanae Kochiya's rant of madness
"Star is not a fairy anymore! Star has seen a world that children could never comprehend! Star is an adult now! Star is running up the stairs of adulthood at full speed!"
—Star Sapphire's rant of madness
"Thank you, Dai. Even though we only met today, I feel like I've played with you my entire life."
— Cirno to Daiyousei after partially losing her memories
"Ran, Chen. I'm sorry..."
"The only thing that can oppose god in a world where everything is open is a closed eye of love."
— Kaguya Houraisan's cryptic message to Koishi Yakumo.
"Ahaha, Gensokyo's so fun! The people just keep piling up, it never stops! This kind of place is exactly where I belong."
— Suika Ibuki, enjoying her life before all the madness started
"Together! Here we go!"
— Reimu, preparing her Last Stand alongside Marisa to avenge Gensokyo in Paris.
"Hey, Marisa, do you remember the time we spent together in Gensokyo? Those days full of surprise and discovery. They were never boring. Different kinds of people, always something going on. We went to so many places, so many memories... It might be out of character for me to say this, but those bygone days, every single one... They were my irreplacable treasure."
— Reimu to Marisa, reminiscing about Gensokyo shortly before their demise
"I do not wish to return to The Moon! It's a place where I can know neither life nor death. If I am to stay in such a place, I will surely lose my heart! I don't want to become heartless! If... If I have no choice but to return to the place that forsook the grandparents who raised me, I would ask you to use your power and kill me right now!"
— Kaguya Houraisan to Eirin Yagokoro in a flashback scene
"Yukari... You really hate this eye of mine? I want to understand Yukari's feelings... Hey!... Look!... Yukari! My heart... It's open."
—Koishi Komeiji's moment of Character Development
