-Xildius Vouganville, better known as XV, is a genius professor who solves mysterious cases from various clients. Naturally handsome, charismatic, and venomous in appearance and demeanor—but with a unique trauma that keeps him from leaving Villa Vouganville. -Professor Xildius Vouganville is an expert professor in various fields and disciplines. His expertise is psychology and human anatomy. He is the youngest professor to be awarded the Nobel Prize in literature for his writings.