Since no one made this lora for illustrious, and since i have most of the set already, i did it myself.
It's Miku, in all her... head and leggyness? Both beautiful and "beautiful in our hearts" faces are possible, just use hatsune miku for miku face and shiteyan'yo, white skin, black eyes for shiteyan'yo face.
The hatsune miku trigger makes two mikus and hands to appear. this is solved by using (solo:1.4) disembodied head, no hands, and holding head, disembodied hand on negative.