Why am I the Villainous

Sen Thider pressed her temple..."Now,tell me something.... I am what in this stupid novel?""You are the silently crazy villainous who would be killed by her fiance for falling out with the female lead....""Oh,who is that fiance? Let me go and finish him once and for all!"Philia stared at her in disbelief."Aren't you suppose to go and deal with the female lead?""Huh?She's my half...