This is...

...Milady's seal, alright.

Messenger bats?

They can magically trace the location of recipients with ultrasonic waves, apparently.

Wow.

They can't fly in the afternoon though, since they'll turn to ash in the sunlight.

...That sounds inconvenient.

Good news.

The Scarlet Devil Mansion's holiday plan has been completely retracted.

Milady and Patchouli-sama want me to come back immediately.