Also known as: バイアス
Mid-Boss, real name Vyers, is a character that has first debuted in the Disgaea and made several cameo appearances in the later sequels. He obtained the nickname "Mid-Boss" from Laharl, who deemed him unworthy of his title of "The Dark Adonis" (which is self-proclaimed) and is the unofficial rival of Laharl.
He is very kind and good-natured, despite being a demon, possesses a French accent, and is very cocky in his abilities which results with him constantly challenging Laharl, Etna (Disgaea), and Flonne. It is later revealed that Mid-Boss is actually King Krichevskoy, who is Laharl's father.