Artist. Don't confuse this artist with Aka Ringo.
Japanese name: あかいりんご (Akai-Lingo or Akai Ringo)
Circle name: りんご屋 (Ringo-ya)
https://www.pixiv.net/users/2554050
https://www.pixiv.net/stacc/akai-lingo
https://twitter.com/akailingo
https://twitter.com/intent/user?user_id=350003072
https://seiga.nicovideo.jp/user/illust/16785920
https://www.nicovideo.jp/user/16785920
https://sketch.pixiv.net/@akai-lingo
https://www.tinami.com/creator/profile/28041