Child prodigy
However, his power is not fully developed and he lacks the experience of other captains and their emotional maturity (he still sometimes acts like a child trying to do an adult's job). Most Shinigami can never obtain bankai but Hitsugaya is the youngest person to learn it in the history of Soul Society. Toshiro Hitsugaya is somewhere between 10- to 13-years-old ( biologically speaking) and has been recognised as a prodigy since a much younger age.His parents telling him that he was perfect compared to Finral is part of what starts Langris' Sanity Slippage. Other nobles criticized him for this, while praising Finral for his natural talent at being a socialite.
His only weakness was (and still is) his anger and awful social skills. Flashbacks reveal that he's a natural when it comes to magic, studies, athletics, and other types of hard work.
She achieved a near-perfect SAT score at the age of 6 and graduated at the top of her class at MIT when she was 12.
Katie Lindberg from Alyosha! was one of these before maturing into a Teen Genius.