Beast Boy is another good option. His ability to transform into different animals can bring humor to the fanfiction. He could also be a mediator between Starfire and Blackfire, using his light - hearted nature to ease the tension between the two sisters. His friendship with Starfire can also be explored further in relation to Blackfire.
Nightwing is alive in the comics. He's had his share of challenges and close calls, but as of now, he continues to fight for justice and protect the people.
Starfire's age varies depending on different storylines and comic arcs. But generally, she's often depicted as being in her late teens or early twenties.
It can symbolize protection. Batman is the mentor, and when he carries Nightwing, it shows his instinct to keep Nightwing safe from harm, whether it's physical harm from villains or other threats.
The number of Nightwing comics can vary depending on how you count them. There are main series, spin-offs, and special editions. All in all, it's a substantial collection.