She's literally saying "Please go die." but she's using Japanese internet slang by using the kanji 氏 (which is pronounced 'shi' and means "Mr.") instead of 死 (which is also pronounced 'shi' but means "die").
So in keeping with the internet slang aspect of things, I went with "an hero" which is 4chan slang for "go die" (or more specifically, "go kill yourself").