A Persona is a manifestation of a Persona User's personality in the Persona series, referred to as a "mask" for an individual to use to face hardship. A Persona is similar to a Shadow. Shadows are malevolent manifestations of one's inner thoughts, while a Persona is a manifestation of the same feelings but tamed and trained. If an individual takes up a resolution in their heart, the Persona will undergo a metamorphosis into a stronger form. While the summoning sequences of a Persona differs from one installment to the next, a tradition that later adaptions follow is that blue-ish fogs are always released when a Persona is invoked. A fight using Personas weighs the user's mind and spirit. Continuous use of a Persona will eventually drain the user's strength and stamina.