I read spoilers in the comments and heres a vague one:
She doesn’t use the hourglass but the Crowned Prince saves her
Or helps ig
SPOILERS
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in the novel she doesn't use the hourglass since it's a bit far from her
instead, the bracelet (from the crown prince) actually had some bit of magic in it. when it was ripped by mielle, the bracelet breaks and a "signal" was sent by the crown prince. cp then immediately goes to save aria using his teleportation. after that, they escape the crime scene, leaving mielle confused
THIS BITCH JUST WHAT-
pls tell me aria used the reverse hourglass oh my GOD (actually pls dont tell me anything, no spoilers~)