Another option could be Van Helsing from the movie of the same name. He is a classic vampire hunter. He and D could exchange hunting techniques and knowledge. And they could form an alliance when they discover a group of vampires that are planning something really big, like taking over a major city.
Alucard from "Hellsing" would be a great addition. His overpowered nature and complex personality would contrast well with D's stoicism. They could have an interesting dynamic, either as allies or enemies depending on the plot.
Definitely a magical gnome. Gnomes are often associated with magic and mischief, and they could interact with the little vampire in fun ways. And an angel character would be great too. The angel could represent the good and the vampire could be on the more 'grey' side of morality, leading to some great character development moments.
Perhaps there could be a character in the Harry Potter world who has vampire - like abilities and is mistaken for a real vampire. D is called in to deal with this 'vampire' but realizes it's not a normal vampire case. He and Harry then have to figure out what's really going on. It could involve a dark wizard's experiment gone wrong that created this half - vampire - half - wizard creature, and they need to find a way to reverse it or at least keep it from causing harm.
Luke Cage would also be a great addition. His unbreakable skin and street - smart attitude could bring a new dimension to the story. He could act as a moral compass for The Punisher at times, while also respecting his determination to clean up the streets.
A tough and experienced park ranger. They would have knowledge of handling dangerous animals and could be a key figure in trying to deal with the Indoraptor in a crossover situation. For instance, if the crossover is in a forest - like setting, the ranger could use their tracking skills.
Definitely Daredevil. As I mentioned before, their different moral compasses would create great tension. Elektra could also be included. She has a more ambiguous moral code and her skills would make her a formidable presence in a story with the Punisher.
The main character is D, a dhampir, half - vampire and half - human. He is a powerful vampire hunter with extraordinary strength and skills.
Well, characters from other Disney shows like Raven from 'That's So Raven' could be great. Raven's psychic abilities could create some really interesting interactions with Hannah. Also, characters from 'High School Musical' like Troy. They could have a singing competition or collaborate on a musical project. And what about Kim Possible? Her spy skills and Hannah's secret identity as a pop star could lead to some exciting adventures together.
Well, if you cross it with the Star Wars universe, Darth Vader could be an interesting addition. His dark power and combat skills would be a great contrast to the characters from Into the Badlands. It would be fascinating to see how they interact and whether they could form an alliance or end up as enemies.
Clary Fray would be a great character to include as she is one of the main characters in the Shadow Hunter world. Her skills and determination can add a lot to a crossover story.