Well, he's a seiyuu born in Tokyo in 1986. Nobuhiko Okamoto is most known for his Star-Making Role as Accelerator from To Aru Majutsu no Index, in which he not only won the Best New Actor Award in the Third Seiyuu Awards, he also went on to win the award for Best Supporting Actor in the Fifth Seiyuu Awards.
He's worked with Yuu Kobayashi and Mariya Ise at least twice. Ditto with Ayumi Fujimura. What's front-and-center, however, is that he seems to have developed a (friendly) rivalry with Atsushi Abe as they've prominently faced-off in at least three series' to date. His typecast seems to lie within The Stoic or Casanova type roles pending on the type of series he is in. Also Keiji Fujiwara seems to be a father figure in some roles.
- Luke Ainsworth in The Sacred Blacksmith
- Takumi Usui in Kaichou wa Maid-sama
- Yorito Morimiya in Sola
- Eiji Nizuma in Bakuman｡
- Makoto Kashino in Yumeiro Patissiere
- Issei Tsumuhana in Ookamikakushi
- Yasumi Natsu in Potemayo
- Gau Meguro in Nabari no Ou
- Haruto Terai in Hatsukoi Limited
- John Brown in Ghost Hunt
- Gorou Amaji in Akikan!
- Shin Kanzato in Persona -trinity soul-
- Musashi in Shugo Chara!
- Accelerator in To Aru Majutsu no Index
- Yoichi Karasuma in Asu no Yoichi
- Layfon Alseif in Chrome Shelled Regios
- Sixteen-year-old Nier in NieR Replicant
- Leicester Maycraft in Shukufuku no Campanella
- Takumi Tsuzuki in Mayoi Neko Overrun
- Yumeji Fujiwara in Yumekui Merry
- Rin Okumura in Blue Exorcist
- Hisaya Miki in Beelzebub
- Origami Cyclone (aka Ivan Karelin) in Tiger and Bunny
- Tsukasa Mikuni in Corpse Party: Book Of Shadows
- Kyouhei Huga in Kamisama Dolls
- Kenji Kido in Guilty Crown