Aya Azuma http://www.pixiv.net/member.php?id=9853

She's the Dazzling Gold Color Touhou Project Doujin released Aug 6 '17 Slice of life
Amaz Box Touhou Project Doujin released Oct 21 '17 Comedy Slice of life
Lost Girl - Lost Lady Touhou Project Doujin released Nov 27 '17 Marisa x Reimu