Artist.

Japanese name: 珠珠 (しゆしゆ, Shiyushiyu; the artist uses this spelling: "Siyu2")
The other name: 虹玉しゆしゆ (Nijitama Shiyushiyu)
Old names: 虹玉 (Nijitama) or 珠

See also

• Pixiv account: http://www.pixiv.net/member.php?id=389075
• Tinami account: http://www.tinami.com/creator/profile/26307
• Pixiv sketch account: http://sketch.pixiv.net/@nekokalpis
• Niconico account: http://www.nicovideo.jp/user/7757217
• Niconico Seiga: http://seiga.nicovideo.jp/user/illust/7757217?target=illust_all
• Niconico Manga: http://seiga.nicovideo.jp/manga/list?user_id=7757217
• Niconi Solid: http://3d.nicovideo.jp/users/7757217
• Nicopedia userpage: http://dic.nicovideo.jp/u/7757217
• RPG Atsumaaru: http://game.nicovideo.jp/atsumaru/users/7757217
• Twitter account: http://twitter.com/nijitama_siyu2
• Drawr account (unconfirmed): http://drawr.net/nekokalpis