Bonkers I tell you, bonkers.
Waifu has shipped, I better start construction of a 180x60cm pillow.
I picked up some cheap $2.50 pillows from IKEA (along with some rechargeable batteries, as you do), and the filling is surprisingly decent, $2.50/410g of polyester fill isn't too bad at all.
Hmmm I really need to buy a cutting mat and a rotary cutter...plus minus 1cm tolerance measuring and cutting with scissors isn't quite enough for me at this stage. Still working on my sewing technique too.
Diamond's hair is very sparkly in the anime, I need some sort of contraption to make her hair shine on the pillow...which means I need ultra high powered RGB LEDs....inside a pillow...maybe not the safest thing in the world and perhaps not an ideal environment for power LEDs. (so I'll have to spread the heat load between a large array of LEDs to keep the junction temperatures down, which keeps efficiency up).
Another issue is that pillow stuffing is fairly opaque and acts like a very big diffuser, so it will be challenging to try and focus the light on her hair and not just have her whole upper torso light up like a Christmas tree....but maybe that's ok.
Time to hit Mouser.