tetsurou_(fe+)
Japanese name: 真島てつろー or 真島テツロウ (Mashima Tetsurou) (reading is a best guess)
Old names: 鉄労 (Tetsurou), "Fe+", てつろー.com, テツロウ (Tetsurou) or テツロー (Tetsuroo)
Circle name: あぶら畑グランテッド
The other circle name: あぶら畑牧場
Site name: てつろーと、ペペろーしょん
He has deleted his Skeb account after he publicly admitted to having been using AI for his artworks since 2023.