Not to be confused with Thecla.
"So let's simplify. Let me repeat the first lesson I taught you. She's Issa and she doesn't get in the tub with men. But I'm Tekla, and I do, very much."
- Explaining her nature to Geralt

Tekla is one of the workers in Priestess Maerlina's baths, with duty to accompany customers into bath and clean them, introduced in The Witcher: Curse of Crows graphic novel. Unlike her colleague and friend, Issa, she is not only willing only to clean a male customers but also to have a physical type of love with them.