He could be really mischievous. He might play pranks on Derek all the time, like hiding his shoes or putting salt in his coffee by mistake. But all in good fun, of course.
Perhaps he's very intelligent and studious. He spends most of his time reading books and asking Derek difficult questions that Derek sometimes struggles to answer. This makes Derek both proud and a bit envious at times.
Derek's younger brother was a shy lad. He often hid behind Derek when strangers were around. One time, there was a local fair. Derek wanted his brother to have some fun, so he took him there. At first, his brother was hesitant, but Derek encouraged him to try the rides. As they shared cotton candy and laughed on the Ferris wheel, their bond grew stronger, and Derek knew he would always protect his innocent younger brother from the big, bad world.
He could be really outgoing. Maybe he's the type who makes friends easily and is always the life of the party at Hogwarts. Unlike Harry who was a bit more reserved at times, the younger brother could be constantly getting into adventures and dragging Harry along with him.
They could interact in many ways. For instance, Percy's younger brother might be a devotee of Zeus and constantly seek his guidance. Zeus, in turn, could use the younger brother for his own purposes, like having him perform tasks that Percy would refuse.
One possible plot could be that Aelita's younger brother discovers the secrets of Lyoko on his own. Maybe he stumbles upon a hidden entrance to the supercomputer while exploring. He then has to learn how to navigate Lyoko and deal with the threats there, all while trying to keep it a secret from the others at first. As he gets more involved, he might develop his own unique abilities that are different from Aelita's, which could change the dynamics of the group's battles against XANA.
I'm not sure which Geng Mei comic you're referring to. If you can provide more details or background information, I will try my best to answer your questions.
Well, one possible plot could be Naruto growing up in the world where Rias lives. He might struggle to fit in at first because of his different upbringing in the Naruto universe. But then, he could use his ninja skills and strong will to protect his sister Rias and her friends. He could also introduce some new ninja - like elements to their world, like new combat techniques or ways of training.
Maybe the younger brother discovers a new martial arts technique and Ranma is initially jealous. But then they end up working together to perfect it. This would show their growth as individuals and as brothers. They could face challenges from other martial artists who want to steal the technique too.
The plot could involve the younger brother trying to protect Naruto. Since Naruto is female in this universe, she might be more vulnerable in some ways. The younger brother could use his Uchiha powers to fend off those who would harm her, all while dealing with the politics of the Uchiha clan.
One common theme is family loyalty. Derek and his little brother often have to rely on each other and their bond is unbreakable. Another theme is self - discovery. The little brother usually has to figure out his place in the world, especially in the context of the supernatural elements. And protection, as Derek is always looking out for his little brother.
One common theme is the struggle for identity. Since he's in Erza's shadow, he often has to find his own place. Another theme is family loyalty, as he tries to support Erza and live up to the Scarlet name.