So the artist here is definitely soso_(chlgksk110); I found this same work of Marin in soso's Fanbox (but curiously not in their listed Twitter or Pixiv pages.) The linked Twitter for Shisusko has other posts of soso's artwork but with miniscule like and retweet numbers, plus the Fanbox only has one post (one that is already listed in soso's Fanbox.) It wouldn't really make sense for the same artist to have multiple Fanbox accounts, so that plus the lack of buzz on the Twitter posts plus existing Twitter accounts on soso's page still being active leads me to believe this is an art thief account, but I'm not 100% sure.
So the artist here is definitely soso_(chlgksk110); I found this same work of Marin in soso's Fanbox (but curiously not in their listed Twitter or Pixiv pages.) The linked Twitter for Shisusko has other posts of soso's artwork but with miniscule like and retweet numbers, plus the Fanbox only has one post (one that is already listed in soso's Fanbox.) It wouldn't really make sense for the same artist to have multiple Fanbox accounts, so that plus the lack of buzz on the Twitter posts plus existing Twitter accounts on soso's page still being active leads me to believe this is an art thief account, but I'm not 100% sure.
Damn. Thanks for the info, and I guess the artist should be changed then, at least.