Your screenshot shows that it's Arimi's skin, which doesn't exist on his Forum and I haven't seen it anywhere
Or someone was playing and putting their own loading, which again misleads us
However, there is a possibility that it is still a part of his legacy, but hardly anyone will be able to help you

It could be just "makeup", but I wonder where you got that skin
There aren't many Luna skins, so the right source will probably be found quickly