@Beef_Yakiniku
In Japan normally the sound isn't mutable, due to perverts using silent cameras to take pictures of womens underwear on trains and stuff. So for hers not making a sound is implying her being a pervert again.
Fighting his inner demons, he's ready to sacrifice himself.
Of course speaking from a purely "saving the species" standpoint, even losing all 4 guys there would be ok, if they save Hana. 😎