Turns out the one spreading the rumors was Hashimoto, who did so at the behest of Sakayanagi. Shortly thereafter, Sakayanagi appears before Class C and she informs them she has evidence regarding the rumors about Ichinose.
I would buy that hair clip 
for my little sister.
أنّي سأشتري مشبك الشعر ذاك لأختي قطعاً
dass ich meiner Schwester
die Haarspange kaufen würde.
que j’achèterais cette épingle à cheveux
pour ma sœur.
che sarei stata io
Eu compraria aquele prendedor
de cabelo para minha irmãzinha.
что любой ценой…
подарю сестре эту заколку!