Artist, NicoNico video creator, best known for the artist's Touhou video series: ”Nise-Koumakyou” Formerly tagged as Jack.
His fan-nickname, 友達が少ない人 (lit. "a person who doesn't have many friends") came from Rumia's quote in one of his videos: ”...Is that so? You have no other friends?”

Artist name: JACK
Fan-nicknames: 友達が少ない人 (Tomodachi ga Sukunai Hito) or メタルマックスの人 (Metal Max no Hito)

See also

• Pixiv account: http://www.pixiv.net/member.php?id=1885391
• NicoNico Douga account: http://www.nicovideo.jp/user/6903747
• NicoNico Douga MyList (Touhou): http://www.nicovideo.jp/mylist/22235942
• NicoNico Douga MyList (Derodero x Code Geass crossover) http://www.nicovideo.jp/mylist/9634540
• NicoNico Douga MyList (Derodero): http://www.nicovideo.jp/mylist/15890161
• NicoNico Seiga images: http://seiga.nicovideo.jp/user/illust/6903747?target=illust_all
• Nicopedia article: ”Tomodachi ga Sukunai Hito”: http://dic.nicovideo.jp/id/4806658