The group trains so that everyone can pair with any other team member and use their powerful Unison attacks. But Shirabe is having trouble pairing up with anybody but Kirika, because of her inability to trust others.
That technique originated 
with the Hida Ninja Army.
أصل هذه التقنيّة هو جيش نينجا هيدا
Diese Technik stammt aus der Hida-Ninja-Armee.
Esa técnica viene del clan ninja Hida.
Esa técnica viene del clan ninja Hida.
Quella tecnica è stata ideata
dall'armata ninja Hida.