Silver is often depicted as very determined in fanfictions. His strong will to achieve his goals can be an inspiring quality. He also has a kind heart, which makes him a likable character in relation to the reader. For example, he might be shown as being protective of the reader.
Shadow might show his love in a very protective way. He'd always be there to keep the reader out of danger, using his speed and strength to shield them from any threats.
The 'Dark Silver the Hedgehog story' could be a really interesting and complex one. If we assume it's a new take on the Silver the Hedgehog character, perhaps he discovers some dark secrets about his past or his world that lead him down a different path. Maybe he has a conflict with his friends or allies who don't understand his new 'dark' attitude. He could be on a journey to either embrace this new side of himself or fight against it to return to his original self. It might also involve a new set of enemies that are attracted to his 'dark' energy, creating a whole new set of battles and storylines.
Destiny is also a big theme. Silver is often depicted as trying to fulfill his destiny, whether it's saving his world or something greater. Additionally, the concept of hope is common. Despite the difficulties he faces, he usually holds on to hope, which is a central part of many fanfictions about him.
Well, the story of 'Shadow the Hedgehog' game is quite engaging. Shadow starts off with a lot of mystery surrounding him. He has super speed and other cool abilities just like Sonic. But his journey is different. He's constantly haunted by his past and questions about his existence. As he progresses through the game, he uncovers more about who he really is. There are levels where he has to fight against enemies that are related to the organization that created him. And like I said, his decisions in the game can lead to different outcomes, which makes the story really interesting and replayable.
One possible Shadow the Hedgehog love story could be that Shadow meets a kind-hearted female hedgehog in the forest. She is always helping other small animals. Shadow, initially cold-hearted, is gradually attracted to her warmth and kindness. As they spend more time together, Shadow starts to open up his heart that was once filled with only vengeance. And they fall in love, sharing adventures and protecting the forest together.
One common theme is time - travel, as Silver has time - traveling abilities in the games. Fanfictions often explore different ways he can use this power. Another theme is friendship, like how he forms bonds with other characters from the Sonic universe. For example, his relationship with Sonic and how they learn to work together.
Since I'm not sure of the exact story, I'd say one key element could be Silver's transformation into a 'dark' version. Another might be his new powers or abilities that come with this change. And of course, his new relationships with other characters, whether they are enemies or those who try to bring him back from the dark side.
The character of Silver himself. He has these cool psychic powers. Fanfics can explore how he uses them in different situations that the official games might not have shown.
Perhaps a new, unknown villain emerges and kidnaps Silver to lure Sonic or the other heroes. The kidnapper could be after Silver's psychic powers, thinking they can be used for some evil plan. The plot could then revolve around Sonic and his friends trying to rescue Silver and stop the villain's scheme. It might also involve Silver using his own wits and powers from within his captivity to either escape on his own or send a signal for help.