A missing artist who used two names.
Name (1): δΌθ€ γ²γγγ (Itou Hiroyuki)
Name (2): ε²©δΊ ζδΉ (Iwai Akiyuki) (reading is a best guess)
The other names: δΌθ€ (Itou) or γ€γγΏγγΉ (Itotarosu)
Site & circle name: γ«γ©γγ (Caravina)