It could be a jealous rival archer who wants to prove himself better than Roy. This rival might feel that by kidnapping Roy, he can steal his thunder and show the world that he is the superior archer.
A criminal syndicate led by a mastermind villain could be the kidnapper. They might see Roy as a valuable asset either to ransom off to the heroes or to use his skills in their illegal activities, like stealing valuable items from highly - guarded places.
It could be a vengeful demigod. Maybe someone who lost in a competition to Annabeth and is now seeking revenge.
Maybe Misa. She's completely devoted to Light, but what if she discovers that Light has been using her all along? In a fit of rage and heartbreak, she could kidnap him. She has the means as she's also involved with the Death Note. She might want to make Light pay for his betrayal or force him to love her truly.
There could be a new dark force in the wizarding world that kidnaps Albus as a way to gain power. They believe that Albus has some sort of latent magic or knowledge that can be harnessed for their evil purposes. Maybe they have some prophetic vision that led them to target Albus specifically.
The Black Hood is a likely candidate. Since he has a history of causing trouble in Riverdale, he might kidnap someone to send a message or continue his reign of terror. He could target Cheryl, for example, thinking she's a symbol of the wealthy and corrupt in the town.
A rival mermaid from another tribe could be the kidnapper. Maybe this mermaid feels that Melody is getting too much attention and is seen as a threat to her own status in the ocean community. So, she decides to kidnap Melody to make her disappear.
Another possibility is some new, unknown villain. Maybe a dark wizard from a far - off land who has heard about Bloom's power and wants to use it to open a portal to a different dimension or something. This new villain could have some unique powers that make it difficult for the Winx girls to track him down.
Roy Harper is a DC Comics character who is known as Speedy and later Arsenal. He's a skilled archer and a sidekick to Green Arrow.
Another possibility is a new villain who has emerged and sees Roy and Dick as symbols of the superhero establishment that he wants to undermine. This new villain could be someone with a grudge against the way heroes operate in general and thinks that by kidnapping them, he can make a statement.
Roy Harper's fate in the comics is not straightforward. Sometimes he's shown as dead, but comic universes are constantly evolving, and his status can change based on various creative decisions and story developments.
Fanfiction that involves abuse is highly unethical. In the case of Roy Harper fanfiction, it can be extremely distressing for fans who love the character. It goes against the general positive portrayal and can also promote harmful ideas about abuse, which is unacceptable in a moral society.