Lucas could try to find a weakness in the masked man's security. If he's tied up, he might look for something sharp to cut the ropes. Maybe there's a broken piece of glass or a rough edge on a table in the place where he's held captive.
The masked man might kidnap Lucas for ransom. Maybe Lucas comes from a wealthy family in the fanfiction world, and the kidnapper sees an opportunity to get a large sum of money.
Maybe he's a bounty hunter hired by someone who has a grudge against Lucas. This someone could be a powerful villain who wants Lucas out of the way. The masked man is just doing his job, but as the fanfiction progresses, he might start to question the morality of his actions.
One possible plot could be that the masked man has some vendetta against Lucas. Maybe he's from Lucas's past, an old enemy. He captures Lucas to get some sort of revenge or information. In the fanfiction, Lucas could be a heroic character, so his friends might start a rescue mission. The masked man could be holding Lucas in a secret lair, filled with traps and puzzles for the rescuers to overcome.
It could be an old rival of Naruto's who has fallen to the dark side and now uses a masked form to hide their identity. Maybe someone like Sasuke if he had been further corrupted by Orochimaru's teachings. Another possibility is that it's a new character created specifically for the fanfiction. This new character could be a rogue ninja from a far - off land who has a grudge against the Hidden Leaf. Or perhaps it's a resurrected villain from the past, like Madara Uchiha, who has been transformed into a masked demon through some dark jutsu.
The masked man could be a new character created specifically for the fanfiction. He could be a ninja from a far - off land who has come to the Naruto world with a hidden agenda. He wears the mask to blend in and observe the different ninja villages. Another possibility is that it's a reincarnation of a powerful and evil being from the past, and the mask is a way to contain some of his power while also hiding his true form.
The masked man in Naruto fanfiction might be a character created solely for the fanfic. He could be a powerful shinobi who was experimented on by Orochimaru and now seeks revenge. Or perhaps he's a long - lost relative of Naruto, who was hidden away and now has a different view of the ninja world and wants to reshape it. Another possibility is that he's a spirit or a demon in a human form, with its own motives.
Fanfiction involving sexual content is generally not appropriate as it often goes against ethical and moral standards. It may also be a violation of the privacy and dignity of the characters if they are based on real people. Additionally, such content may not be suitable for a general audience.