Formerly inactive artist, who posted this on November 5, 2019 before deleting their twitter account shortly thereafter.
Some detailed speculation regarding the deletion can be found here (written in Chinese). Came back in November.
Nickname: スメタナ (Smetana / Sumetana)
https://x.com/DetonateHamster
https://x.com/HamsterFragment
https://x.com/i/user/708107801407594501
https://x.com/i/user/1900039518750990337
https://pawoo.net/@HamsterFragment
https://www.pixiv.net/users/17494898
https://bsky.app/profile/hamsterfragment.bsky.social
https://bsky.app/profile/did:plc:hls6ppyokjobsfl2df2forjp
