Thekla Kaischauri, known mononymously as Thekla, is an Austrian professional wrestler who debuted on June 18, 2017. Nicknamed "The Toxic Spider," she is signed to All Elite Wrestling (AEW), where she is a one-time AEW Women's World Champion and the leader of Triangle of Madness. She is also known for her time in World Wonder Ring Stardom from 2022 to 2025, where she established herself as one of the promotion's top international stars and won the SWA World, Artist of Stardom, and Goddess of Stardom Championships. Before breaking out in Stardom, Thekla competed throughout Austria and Japan, making a name for herself in Ice Ribbon, where she captured the Triangle Ribbon Championship. Her rise continued with recognition from Pro Wrestling Illustrated, ranking No. 69 in the Women's 150 in 2022, No. 17 in the Tag Team 100 in 2023 alongside Donna Del Mondo, and No. 46 in the Female 250 in 2025.