Actually not so much a specific character as a
really beautiful production setup like the one
below (from Miyuki-chan in Wonderland
thanks to rain's recent sale).  Whatever you think
about the scene in the middle, those trees and
plants in moonlight are stunningly realized.

I'm glad your problem was diagnosed, haruna. 
Ulcers can be treated pretty reliably, and it's
great to know that those scary symptoms weren't
something much more sinister.  Relax ... and take
your medicine.