Yeah, AIC sketch distribution is random, but
there are a few patterns for the cels that do
have their matching sketches.
There are quite a few of the really nice shin
tenchi Ayeka cels having matching sketches. I
think animegame.com might still have some.
There's also a particular sequence of Tenchi cels
from the 1st ep of the original OVA series that
have their matching sketches. I have the A1 cel
w/ sketch and the others I've seen from the same
sequence on other people's galleries have their
matching sketches too. It's a super close-up of
Tenchi with his face taking up the whole field.
On one sales site alone (which has now closed
down), I saw three Washu ova cels with their
matching sketches. A small full figure sequence
of Washu in the first outfit she wears from OVA
Ep. 9. I wanted to get them, but as I said
already, the site was closed for business.
Other than that, I've only seen 3 others. One of
which is a cel of Kiyone's spaceship (I used to
own this cel but not anymore). On rain's
gallery, she has a matching sketch to a great cel
of Ryoko & Tenchi. Finally, I have a pan bg cel
of Sasami & Ryo-Ohki with their matching sketch &