There could be a whole cast of characters. Maybe there's a female character who is Blade's love interest. And perhaps there are some villains too, like an evil sorcerer who wants to steal Blade's special blade for his own dark purposes. Without more details, it's all speculation.
Since I don't know the exact 'blade graphic novel', it's difficult to say. But it could have a character named Blade as the main one. There might also be his allies like a tech - savvy sidekick or a powerful mentor figure.
The main characters in a 'blade graphic novel' might vary greatly. It could be that Blade is a loner at first, but then he meets other characters on his journey. There could be an old hermit who gives him valuable advice, and a group of rebels who he teams up with to fight against a tyrannical regime. The relationships between these characters would likely be complex, with different motives and backstories that unfold as the story progresses.