Quillzone

Quillzone is clearly derived from Quill, but in this case she is actually a cat. She appears humanoid, but like the other monster girls, she is not capable of human speech, and can only communicate via cat-like sounds. However, in her intro, she "Hisses in Japanese" implying that she may be able to speak, but she doesn't show any evidence of human speech apart from her intro. Thus, her "dialogue" is simply the MC's thoughts, and is always in parenthesis. For some reason, it is filled with terrible puns and bad jokes, which seems to be the case with all Monster girls.