The "Marshmaro" characters are visible to us, but not to the people in the BonKoi world. They come in various forms, with various personalities. The scripts call them "Maro (type)." In this episode, Sayuri, Ryou, Mitsuki, Gilbert, and Yoshinosuke have been taken over by the Marshmaros. Enjoy a BonKoi that's a bit different from the usual!
people who are over 190cm tall 
and have wide, narrow eyes, maro.
يبلغون من الطول 190 سم على الأقلّ ويملكون عيونًا واسعة-مارو
mit Leuten reden, die über 1,90 m groß sind
und lange, schmale Augen haben, maro.
gente que tenga más de 190cm de altura 
y ojos grandes y estrechos, maro.
gente que mida más de 190cm 
y tenga los ojos grandes y estrechos, maro.
qu’aux personnes
de plus de 1,90 m et aux yeux plissés.
com quem tem mais de 1,90 m 
e tenha olhos largos e estreitos.