ohirugohan_taru
Artist, mangaka.
Japanese name: お昼御飯たる (Ohirugohan Taru, the artist uses this spelling: "ohirugohan-taru")
The other names: たる (Taru), げそ (Geso), くろたる or 黒樽 (Kurotaru)
Circle & site name: ハイジンステージ (Haijin Stage)
Old circle & site name: "Pumpkin Pie+1" or "PPIE+1"