Artist. Formerly tagged as umiwara_(maruka).
Japanese name: 目海原鏡 (Meumiharagane) (reading is from this pixiv post)
The other names: まるか (Maruka) or 海原 (Umiwara) or あばたも (Abatamo)
Circle name: 烏合の衆 (Ugou no Shuu) (the other members: Ryuukamag_Nesium, Amachi_(alice-eas) and Asashina_(nichishia))