[ His observations are not wrong and Genos isn't resentful for how he holds back and doesn't reveal himself. He could see the merit in not being forthcoming to facing a monster and even if it wouldn't suit his style, to each their own. ]

Because I do not want any harm to come to this doll. [ There's no point in hiding his reason; not when he's the one who was asking for aid. He might have gotten a warning about it earlier about it not being any good for him and clearly it held some truth given what he sees every time something less than idea happens to the doll, but it still wasn't enough for him to abandon it.

How could he ever abandon his master in the first place? ] If I were to fight in the manner that was required of me to defeat this then I would endanger it.