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've come here to save you.
أتيتُ لإنقاذكم
Ich bin hier, um euch zu retten.
Vine a salvarlos.
He venido a salvaros.
Je suis venue vous sauver.
Sono qui per salvarvi.
Eu vim aqui para salvar vocês.
Сегодня я пришла,
чтобы протянуть вам руку помощи!