[@GamerXZ] We did lose Hero's character Icarus as one of the heroes for the arc so I'd be 100% for your character to join the arc and bolster the heroes side. The best time I feel for your character to appear would be in a final clash we're planning between the villains, Gene Co and the heroes.

Edit!: Or actually when the heroes regroup they can be like "I'm calling so and so to help!" then in comes your character~