Got a headache during the tea party, got helped by Gundam, who stayed outside when you spent at least 15 minutes in the bathroom, went to the bathroom and when they returned they found the body, with Naegi and Gant. Gant was feeling really bad and can't talk. This triggered the discovery announcement.

During the investigation Gundam, Naegi and you went to the infirmary to get checked, Hinata was already there. Gant, despite unfeeling well, left early. Gundam left next. Naegi left next. Hinata then left.

You were still there when the second body announcement was announced.