Charapedia asked 10,000 anime fans the question: Which anime characters studied the most? And from thousands of fans, most of the responses are from the male fans (52.5%), female fans (47.5%) and teens in their 20s (85.4%) while the other 14.6% are 30 and over.
Here are the results:
30) Suzu Hagiwara (Seitokai Yakuindomo)
29) Umi Sonoda (Love Live! School Idol Project)
28) Shintarou Kisaragi (Mekaku City Actors)
27) Shouyou Yoshida (Gintama)
26) Seishirou Tsugumi (Nisekoi)
25) Kei Tsukishima (Haikyuu!!)
24) Light Yagami (Death Note)
23) Eru Chitanda (Hyouka)
22) Eli Ayase (Love Live! School Idol Project)
21) Lelouch Lamperouge (Code Geass)
20) Conan Edogawa (Detective Conan)
19) Tsukuyomi Komoe (Toaru Majutsu no Index / Toaru Kagaku no Railgun)
18) Sailor Mercury (Sailor Moon)
17) Hitagi Senjougahara (Monogatari series)
16) Sebastian Michaelis (Black Butler)
15) Ginpachi-sensei (Gintama)
14) Maki Nishikino (Love Live! School Idol Project)
13) Takamine Kiyomaru (Zatch Bell)
12) Koushi Sugawara (Haikyuu!!)
11) Makoto Tachibana (Free!)
10) Tatsuya Shiba (Mahouka Koukou no Rettousei)9) Mio Akiyama (K-On!)8) Yukino Yukinoshita (Oregairu)7) Hidetoshi Dekisugi (Doraemon)6) Mikoto Misaka (Toaru Majutsu no Index / Toaru Kagaku no Railgun)5) Shintaro Midorima (Kuroko’s Basketball)4) Asuna Yuuki (Sword Art Online)3) Tsubasa Hanekawa (Monogatari series)2) Seijuro Akashi (Kuroko’s Basketball)1) Koro-sensei (Assassination Classroom)