Saki and Sakuyo finally realize that Hyoe is the common figure involved in all the demon incidents! In order to track his activities, they opt to disguise themselves and follow him and Mohiro around town.
I think it's because he's so pure-hearted.
أعتقد لأنّه نقيّ القلب
… so in den Bann gezogen,
weil er so ein reines Herz hat.
porque es una persona
de corazón puro.
porque es una persona
de corazón puro.
… c’est parce qu’il a un cœur pur.
credo che sia perché ha il cuore puro.
Acho que é porque 
 seu coração é muito puro.
Думаю, он просто очень чист сердцем.