Do It Yourself!!: Juliet Queen Elizabeth

 A 12-year-old child genius from America who ended up enrolling at Gatagata instead of Yuyu due to a kanji mixup and is staying at Miku's house. As she doesn't like her full name, she received the nickname "Jobko" from Serufu after she hears her say "Good job!". She uses her genius skills and state-of-the-art technology to assist with her DIY projects.

Mieruko-chan: Yuria Niguredou

 Ambitious and self-confident, Julia wants to become an exorcist when she grows up. She can see only the small and weak spirits.