Nickname (1): "sk3" (reading is given as せきさん, Sekisan)
Nickname (2): ソウェル (Sowel)
https://www.pixiv.net/users/494846
https://www.pixiv.net/stacc/sitainaguri
https://twitter.com/poseki_sk3
https://twitter.com/psk_sk3
https://twitter.com/intent/user?user_id=106787761
https://twitter.com/intent/user?user_id=3792954865
http://ch.nicovideo.jp/sowel
https://seiga.nicovideo.jp/user/illust/414985
http://com.nicovideo.jp/community/co18088
http://com.nicovideo.jp/community/co1740624
https://www.nicovideo.jp/user/414985
https://nijie.info/members.php?id=259414
https://pawoo.net/@poseki
https://pawoo.net/@sitainaguri
https://pawoo.net/web/accounts/39381
https://pawoo.net/web/accounts/196244
https://fyt3ucjz.fanbox.cc
https://www.pixiv.net/fanbox/creator/494846
https://sketch.pixiv.net/@sitainaguri
https://skeb.jp/@psk_sk3
https://misskey.io/@poseki
http://mixi.jp/show_friend.pl?id=3318279
http://photo.mixi.jp/home.pl?owner_id=3318279
https://www.youtube.com/user/sowel0630
http://www.ustream.tv/user/sowel0630
https://twitter.com/sowel_sk3
https://privatter.net/u/sowel_sk3
http://twitpic.com/photos/sowel_sk3
http://twpf.jp/sowel_sk3
