Artist.
Japanese name: ﾄﾘｿﾞｳｽｲ (Torizousui or Tori-Zousui)
The other names: ヒロ (Hiro) or 博綺
Solo circle & site name: 御鍋ノ蓋 (Onabe no Futa)
The artist once used the same name as Ohara Hiroki. However there is no credible evidence that they're the same person.
The artist used to be a member of "Fore:Runner", a joint circle with Xog (infra:Red). Their partnership was dissolved in 2012.