Artist. Releases works under the circle name "Tsumi-chan Honpo". Gives reading of name as "ツミタニ ダイスケ".
The third kanji in their name is actually the character for "shinu/shi" and is associated with death. Using the related meaning of "die", this is presumably where they come up with the reading of "dai" from.
Japanese name: 罪谷死輔
https://www.pixiv.net/users/637
https://www.pixiv.net/stacc/die_s
https://twitter.com/Tsumitani
https://twitter.com/intent/user?user_id=318916429
https://www.deviantart.com/tchonpo
https://tsumitani.fanbox.cc
https://sketch.pixiv.net/@die_s
