In some fanfiction, it could be an unexpected character who saves the twins. Maybe a new Autobot that has some unique ability. For example, a Autobot with the power to teleport could get into Megatron's lair easily and whisk the twins away. Or it could be a human ally who has some knowledge of Decepticon technology and manages to disable Megatron's security systems, allowing the Autobots to rescue the twins.
Bumblebee could also be a key savior. He's small but very brave and resourceful. He might be able to sneak into Megatron's lair undetected and find a way to free the twins. There's also a chance that some of the other Autobots like Ironhide or Ratchet could play important roles in the rescue. Ironhide with his tough exterior and powerful weapons could fight off Decepticon guards, while Ratchet could provide medical support if the twins were injured during the kidnapping or captivity.
In such a fanfiction, perhaps Megatron kidnapped the twins to use them as leverage against the Autobots. He might try to force Optimus Prime to make a difficult choice, like giving up a powerful artifact or a strategic location in exchange for their safety.
First, develop interesting characters. Make the twins have distinct personalities. For example, one could be brave and impulsive while the other is more cautious and analytical. Then, create a tense and mysterious setting for the kidnapping. Maybe it's an abandoned warehouse on a stormy night. Also, build up the motivation of the kidnappers. Are they after ransom, revenge, or something else? This will keep readers engaged.
The twins could be new characters created specifically for this fanfiction. They might be force - sensitive individuals with a great destiny ahead of them.
His friends like Tails and Knuckles are likely to try and save Sonic. Tails is smart and could come up with a clever plan, while Knuckles has the strength to fight off Scourge if needed.
His friends like Rukia or Chad could come to his rescue. They care about Ichigo deeply and would surely try their best to find and save him.
Toothless is the most likely one. Their bond is so strong that Toothless would sense Hiccup's distress and come to his rescue. He could fly into Drago's hideout and cause chaos to free Hiccup.
His friends Sam and Tucker could be the ones to save him. They might use their knowledge of technology and Danny's secret lairs to track him down. They could come up with a clever plan to distract Vlad and free Danny.
Another pair that can be used as twins are Erza and Mirajane. Erza, the strong and disciplined knight - like mage, and Mirajane, the sweet and sometimes mischievous barmaid with powerful transformation magic. In fanfiction, if they were twins, their upbringing and how they developed their magic could be explored. There could be a story about how they support each other through tough times in the guild, and how their different personalities complement each other in battles and in their relationships with other guild members.
Often, a plot twist is that one of the twins is actually in on the kidnapping for some self - serving reason. This could be to gain attention or to get a share of a large inheritance. It completely changes the dynamic as the other twin has to deal with the betrayal on top of the kidnapping situation. It also adds an element of mystery as to why the twin would do such a thing.
Maybe her best friend, who is really brave and loyal. They have a deep bond, and the friend won't rest until Rose is safe. Her friend could be really smart and figure out the master's hiding place through some clever detective work.