てっぺい先生
Niconico nickname for professional violinist Okada Teppei.
See also
- Nicopedia article: http://dic.nicovideo.jp/id/4359376
- Okada's Nico Nico community: http://com.nicovideo.jp/community/co331122
- Wikipedia(JP): Sugi-chan & Teppei, a classical music duo composed of Okada and Sugiura Tetsurou, a pianist