This is about the anime characters. For the monster itself, see Pink Eye.
Several Pink Eyes (called Pink Suezos in the anime merchandising) make appearances in the anime series.
In flashback in Episode 8, we see that Holly's Grandfather had a Pink Suezo as a housekeeper, and she played a very maternal role in the lives of both Holly and Suezo after Holly's mother died. She was killed in Naga's raid on their village, though she fought valiantly. Interestingly enough, she always keeps the wings on the sides of her head rolled up into what looks like pigtails.