Who could be some interesting characters to include in 'Arthur and the Invisibles Crossover Fanfiction'?

One idea could be that Arthur crosses over into a world where the Invisibles are facing a new and powerful enemy. He uses his human creativity and skills to help them find a solution. For example, he might introduce new technologies or ways of thinking that the Invisibles haven't considered before.

Arthur himself is a very popular character to focus on. His journey from the human world to the Invisibles' world and how he adapts and grows is always interesting. Selenia is also a popular choice. Her strong - willed and adventurous nature can lead to many exciting storylines.

One idea could be that Arthur discovers a new hidden tribe of invisibles. They have a unique power that can help save the Invisibles' world from a new threat. Another could be Arthur goes on a quest to find a magical object that was lost long ago in the Invisibles' realm, which is said to grant the finder a special wish.

Harry Potter would also be a great addition. His knowledge of magic could be combined with the digital world of Summer Wars. He could use spells to protect the virtual world or help the characters understand new magical elements that might appear in the crossover. His loyalty to his friends and his courage would also be traits that would fit well with the Summer Wars characters.

Arthur is the main character. He is a young boy who embarks on an adventure in the world of the invisibles. There is also Princess Selenia. She is a brave and strong - willed character in the invisible world.

One interesting character to include could be a brave knight from a medieval - themed world. The contrast between the knight's chivalry and Ratbag's cowardice would create great tension and comedic moments. Another could be a magical wizard who constantly tries to force Ratbag to face his fears through various spells and challenges. Also, a sly thief from another world could team up with Ratbag, and together they get into all sorts of misadventures while the thief tries to teach Ratbag some of his more devious skills.

One character that would be really cool to include is Edward Elric from Fullmetal Alchemist. His knowledge of alchemy and his quest for the Philosopher's Stone could cross paths with Naruto's search for power to protect his village. Also, Saitama from One - Punch Man. It would be hilarious to see Saitama's nonchalant attitude towards fighting in the world of Naruto, where battles are usually more intense and drawn - out.

Saber from Fate/Stay Night would be an obvious choice. Since she is also related to the Arthurian legend, there could be a lot of interesting interactions between them. They could compare their experiences as king, or even fight side by side against a common enemy.

Definitely Orochimaru. He is always after power and knowledge. In a gamer crossover, he would be the one trying to hack the game system or find some loopholes to gain an unfair advantage. And Hinata. Her shy but strong - willed nature could be really interesting in a game setting. Maybe she discovers some hidden powers within herself through the game mechanics that she was too shy to explore in the normal Naruto world.

Lara Croft from the 'Tomb Raider' series would be a great character to include. She's an expert adventurer and archaeologist. She could help the Men in Black uncover ancient alien artifacts or secrets that are related to current alien threats. Also, Hermione Granger from the 'Harry Potter' series. Her intelligence and knowledge of magic could be applied in unexpected ways in the world of the Men in Black. For example, she could use spells to help in situations where the Men in Black's technology fails.