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.
but I suspect you, as well, Hashimoto.
لكنّي أشتبه بك أيضاً يا هاشيموتو
pero yo también sospechaba de ti,
Hashimoto.
pero yo también sospechaba de ti,
Hashimoto.
mais je te soupçonne aussi,
Hashimoto.
ma anch'io sospetto di te, Hashimoto.
mas também suspeito de você, Hashimoto.
но я тоже тебя подозреваю, Хасимото.