System: Invisible Me

[No heroine] [Easy] [Intellectual reasoning item] Ike, who traveled to another world, has a ghost system, and this system actually gives him a chance to be resurrected! But why would I die if others found out? I have no choice but to keep a low profile. But why is the style of painting getting more and more strange? What exactly is the system I have? Constantly changing identities, who am I?