Light Yagami/Harry Potter
Light doesn't know how well he had done on the test. The results were good enough for the school to move him up to the last year of primary school. He had the tag of being a 'highly able' child again. The company of kids was replaced by the company of no-less-intolerable adolescents. His new teachers were much more willing to bend to his learning curve than his KG teachers had been.
Light's favorite teacher was still his primary school homeroom teacher. She had stood up to the Dursleys and, Light later realized, had applied for a subsidy for his testing from the school. That reduced cost and attention from the school administration was the only reason Vernon and Petunia had allowed for Light to be tested. Light still visited her during recess and acted the part of an admiring child to his fullest capability.
The action also gave him a chance to meet Dudley. It was a win-win all around, as far as Light was concerned.
The only minus? The test had also highlighted Light's lacking general knowledge regarding the 1980s UK. Light had accepted his 'barely above average' (and low for his standards) score with resignation and barely suppressed frustration. His only source of current general knowledge were Vernon's highly biased news programs.
Light really missed the widespread internet network of the 2000s.