Teena Merkies, originating from the Netherlands, is a member of the idol group Team "May-Bee" and stands as its tallest member at 195 centimeters. Her notable height, frequently associated with her Dutch background, provides an advantage during Hyper Sports competitions, contributing to the team's performance. She possesses long blonde hair and green eyes, typically wearing a white and faded blue long-sleeve top, a long black skirt, black socks, and shoes.

Within Team "May-Bee," led by Hazuki Sakurai with Tomo Miyasiro as sub-leader, Teena's teammates include Yuriko Suemune and Chihiro Honda. The team is managed by the robot Sanae and produced by Shinji Ibuki. Teena primarily engages in athletic competition within Hyper Sports, utilizing specialized performance gear. Her uniform number is 6. Following her original voice actress's retirement on December 31, 2022, Teena received a new voice performance for subsequent audio dramas and song recordings.