Would they run away from the sound of another yukkuri in pain? You could have common yukkuri entry points like windows rigged up so that anything approaching them hears the dying screams of previous invaders.
Hmmm... that would probably work on the smart ones. It might backfire though if you had one of those stupid egotistical yukkuris that thinks it's the strongest thing around and is like 'weak uneasy yukkuris are dying in there! surely there couldn't be anything that could threaten me because I am strong and can puff puff!'
It could be just the neighbour's kids playing and little Marisa want to play along. But leaving the house open, she's like putting "House sale, for free" in front of the lawn.
Yeah leaving the house like that will probably lead to some other yu taking it, or the unexpected random City Cleaning Staff anon finding the empty box and getting rid of it for a more clean and healthy community.
"Whach thad sound?"
Nearby laughter caught Komarisa's attention.
"Yuyu, ich wery eajy! Pwaying wery eajy!"
Komarisa couldn't ignore the laughter.
"Yuyu, jucht a widdle, jucht a widdle, Maricha will come back in jucht a moment, yuyu..."
Unable to bear it any longer, Komarisa left the nest and went towards the sound.