Artist name: EyeHarmHeart (E.H.H. or ehh for short)
Japanese name: いーえいちえいち "Ii Eichi Eichi" (i.e. the phoenetic approximation of the initialism)
Alternate name and accounts for virtual youtuber-centric art: いーえいちえいち_仮現部 ("Ii Eichi Eichi Kagenbu") or ehh_kasou