An artist, SAI user.
Japanese name: こぐ (Kogu)
Circle name: 麦チョコ (the other member: Sae)
Site name: 50ccに号 or "50cc 2"
https://www.pixiv.net/users/555397
https://www.pixiv.net/stacc/kogu
https://twitter.com/kogu103
https://twitter.com/intent/user?user_id=266481890
https://pawoo.net/@kogu103
https://pawoo.net/web/accounts/445126
https://sketch.pixiv.net/@kogu