Several people are startled when they realize that Grenouille is standing close by. This is part of the theme of him being Beneath Notice due to not having a scent of his own.
At the end of the movie, the entire vial, enough to conquer the world through love, is emptied in Paris... the City of Romance.
On the single cover◊ for "Sweet Refrain," the clocks they're holding are set to their respective birthdays! note Kashiyuka: 12/23, A~Chan: 2/15, Nocchi: 9/20