Katja is a "catgirl" drawn by Wenqing Yan. While often mistaken as one, she is actually not a character appearing in the comic, Fisheye Placebo, being just a random design of a catgirl that Wenqing drew while working on the actual comic.
Katja has a orangish-red hair, and her eyes are yellow and look like cat's eyes. She wears a cat hoodie along with many other cat-related clothing such as her scarf, stockings, shoes, and cat-shaped glasses.
The name Katja was created when people were wondering what would her name be. The name Katja rose up in the list of possible names and as Wenqing Yan was okay with it, it became her name.
- Katja (pronounced as KAT-yah) is name commonly used in Germanic countries. It means "pure".
- It is also possible that the name is a pun as the beginning of the name and the word cat is pronounced the same way.
- The cat stockings Katja is seen wearing can actually be bought online.