A young and curious scientist. She is constantly exploring the remnants of the old world, trying to find ways to use the forgotten knowledge to improve the current situation. Her inquisitive nature often gets her into trouble but also leads to great discoveries.
A mysterious wanderer. He has no fixed home and travels from place to place. He seems to have a deep understanding of the dark age and its secrets. He may be a former member of a powerful organization or just a lone soul with a lot of wisdom, and he often appears at crucial moments to help or hinder the other characters.
A pyromancer could be an interesting main character. They have a natural affinity for fire, so they might be either trying to preserve the Age of Fire or manipulate it for their own ends. Their powers could lead them to discover secrets about the Age of Fire that no one else knows.
An old, wise hermit who lives on the outskirts of a village near a dark forest. He has spent years studying the secrets of the shadows and can guide others who are in trouble related to the shadowy mysteries. His knowledge would be crucial in the story.
A young, curious orphan who often sneaks out during the dark of night and discovers a hidden world in the city, filled with all sorts of strange characters.
Perhaps a story about a lone hero who discovers an ancient technology that could potentially reverse the dark age. The hero has to fight against those who want to use this technology for evil purposes. They have to go through many challenges and make difficult choices to protect the technology and the future of humanity.
A half - devil, half - human hybrid who has been hidden away from both worlds. This character could have a struggle with their identity, not fully belonging to either the devil or human side. Their powers could be a combination of both, which would make them a very interesting addition. They might be discovered by the main characters and then have to figure out where they stand in the grand scheme of things.
Cynder could be a key character. She has a connection with Spyro and could play a role in helping Dark Spyro either come to terms with his powers or in fighting against a common enemy.
A young Twi'lek girl with extraordinary Force - sensing abilities could be a new character. She could be an orphan who was raised in the slums of a planet but discovers her powers and is sought after by both the Jedi and Sith. Another could be a Mandalorian warrior who has his own code of honor and gets involved in the Jedi - Sith conflict in Dark Destiny. And a droid with a malfunctioning protocol but a unique ability to detect dark side energy could also be an interesting addition.
Since I haven't read the 'dark blood age novel', I can only guess. There might be a strong - willed protagonist who is on a quest to uncover the truth about the dark blood age. There could also be an antagonist, perhaps someone who benefits from the chaos and bloodshed of this age. And then there may be some side characters like a wise old mentor or a group of friends who help the protagonist in his or her journey.
It could also be an existing character from the Harry Potter series like Hagrid. Given his love for all creatures, including some that are considered dangerous, he could be at the center of a story about the 'Lord of Dark Creatures'. He might be trying to protect these creatures from those who would use them for evil purposes or trying to rehabilitate them.
A young, inexperienced mage could be a main character. They might be just starting to learn about their powers when the rise of darkness begins. Their naivete could be both a strength and a weakness as they navigate this new, dangerous world. Another could be an old, grizzled warrior who has seen many battles but is now facing an enemy like never before in the form of the rising darkness.