Artist. Formerly tagged as usisan or urayama41.
https://www.pixiv.net/users/5570815
https://www.pixiv.net/stacc/usisansan
https://twitter.com/YEBLSU
https://twitter.com/urayama41
https://twitter.com/intent/user?user_id=78917255
https://twitter.com/intent/user?user_id=101971238
https://seiga.nicovideo.jp/user/illust/21721
https://pawoo.net/@usii
https://pawoo.net/web/accounts/53500
https://sketch.pixiv.net/@usisansan
http://portal.circle.ms/Circle/Index/10216868
http://webcatalog.circle.ms/Perma/Circle/10216868