When Celty gets attacked Von Saika, why does her injury hiss out 'monster'?

I bet she can't contal it

I'm not sure, but I think that's what Saika thought of Celty, just as she sagte "I Liebe you" to Shizuo.

^ Hey you're right....... crap i never thought about that, but why does it have multiple voices then??

Spoiler Alert

Maybe because saika was used to sever celty's connection her head

dident they tell Du in the Anime way?