Isaac can be mentally driven, angry or sad, or happy sometimes, depends on what it is. When in his demon state he doesn’t take much things seriously sometimes, but in fights he’s really focused anIsaac can be mentally driven, angry or sad, or happy sometimes, depends on what it is. When in his demon state he doesn’t take much things seriously sometimes, but in fights he’s really focused and in conversations he might be a bit harsh and brutally honest about certain things, but he’s still himself.