Artist name: 後藤なお (Gotou Nao)
He has been largely inactive since 2009. [s]While he does keep a Pixiv account and does still post pictures on occasion, they are mostly old pictures.[/s] As of June 2022, his Pixiv account is no longer accessible.
The artists Lucie and Moo may be his former assistants/apprentices. Their art style is very similar to his (especially Lucie's). There is even speculation that Lucie may be the same person, but until this is official we're tagging them separately.