Light Yagami/Harry Potter
"Not now, Dudley," Vernon replied softly. Even he had learnt by now what happened when Dudley was onto something about Light. Dudley was even worse than one of Marge's dogs with a bone.
"Tell me," Dudley demanded. "Tell me, tell me, tell me, tell me, tell me, tell me-"
"Dudley," the teacher took this chance to speak up loudly. She did not know what was happening but clearly it was something. Something she could take advantage of. "We are talking about getting Harry tested. Into a better class. He is very intelligent, isn't he?"
Dudley beamed. "Yes! Cousin is very good. At everything," he whispered conspiratorially. "He teaches me words too! Better than you."
Light was very proud. He couldn't have done it better himself.
"Harry is very responsible. You care very much for your cousin, Harry?" The teacher asked.
"Yes." Light nodded. "Dudley was having problems. No one was helping him. So I did."
"Very observant," she praised. Vernon and Petunia looked at each other in a silent conversation.
"If," Vernon started, "if we decide to get the boy tested, how much would it cost?"
"Not much at all!" The teacher beamed and started discussing the particulars with the Dursley adults. Next to Light, Dudley looked over for praise and Light rewarded him with a fond headpat.
Finally, he would be able to get out from the kids class. Surely talking to ten or twelve year olds would be better than six. Japan didn't have a system for skipping grades before the first two years of high school. Light was so very grateful his second life was in Britain.