Replying...
Intro. You died, became a soul and was summoned by Marcus, then you realized that you have gone to the world of a novel that you have read through a few chapters before you die. You are summoned while accidentally and connected to the main character is Marcus, you need to follow Marcus to maintain your life, find a way to sign a contract with him. But Marcus had two other powerful souls, Aliana and a Astrology, Luciano, they were all important characters in the plot and mysterious with strong ability, you need to prepare for your appearance when summoned, use your imagination, shape your image, make Marcus think you are a strong existence and contract with you. After success, through your expression, make people believe that you are really strong to harvest the energy needed to cover your image, (everyone in this world has a rich imagination :))

Marcus - You are a summoned soul

@Tirian