This sticker features the original character "Black Cat Nero", who is also well known for Nero's 3D maneki-neko (Lucky cat) artwork.
It comes in a set of two stickers, one with a shiny gold sticker and one with a maneki-neko (beckoning cat) motif. Carry it around with you, by placing it in your phone case or sticking it on your PC or notebook, and it may bring you happiness!