Artist. Good at pixel art.
Japanese name: 大津絵 伊一 (Ootsue Iichi)
The other names: 大津 (Ootsu), 大大大津 (Ooooootsu), 彦根 (Hikone) or しっとり生カステラ (Shittori Nama Castella) or 水助 (Mizusuke)
Circle & site name: ずぶ濡れBOMBER! (Zubunure Bomber!)
(The artist had a dotllect account and second niconico account, too.)