What does it mean that the group members have given me back the light?

"Light is a bond, and it will be passed down." Gu Nuo always thought that line sounded cool—he just never expected to become the light himself. After all, what are the perks of being the Light? Endless battles against terrifying alien beasts? Or becoming a prime target for shady organizations hunting human test subjects? Frankly, he’d rather pass the burden to anyone else. Unfortunately, escaping destiny isn't that simple, and "Noah" is still hot on his heels. When Haji finally made his choice, Gu Nuo could only breathe a complicated sigh of relief, hoping the inherited power might at least find a useful purpose. But his brief moment of peace shatters instantly when even more powerful Evolution Trusters burst straight out of a chat group and begin chasing him down. Damn it all—why is Noah still hunting him?!