Ciel wins the P4's trust, but he still can't find a chance to get close to the Head Master. And so he brings up the subject of Derrick Arden with the P4 and their drudges. When he does, the expressions on the prefects' faces change...
Yes. The one who seems most likely 
to have pertinent information
أجل. الشّخص الّذي يبدو أنّه من المرجّح
أن يمتلك معلومات وثيقة الصّلة
Ja.
Bien. Y quien parece tener
la información más útil
Por supuesto.
Quien quizá posea información es
Bonne idée.
Celui qui devrait en savoir le plus,
Un'ottima idea.
Sim. Quem tem mais chances
de ter informações pertinentes
Правильно.
И больше всех о нём должен знать…