Tehkans are characterized by their tall, slender frames, elongated limbs, and distinctive facial features, including large, expressive eyes and a smooth, featureless skin tone. Their physiology allows them to thrive in extreme conditions, such as the cold of Europa or the toxic atmosphere of certain exoplanets. They are also known for their long lifespan, which can exceed 150 years, and their high intelligence, often excelling in scientific, military, and diplomatic fields.
In the *Mass Effect* series, Tehkans play a significant role in the broader conflict between the Galactic Federation and the Reapers, an ancient machine race that periodically wipes out sentient civilizations. The Tehkans are initially introduced as a mysterious and advanced species, later revealed to be descendants of the Protheans. Their society is highly structured, with a strong emphasis on science, exploration, and the preservation of knowledge. Tehkans are also notable for their use of advanced biotechnology, including genetic modification and cybernetic enhancements.
The Tehkans' culture is marked by a deep respect for history and tradition, though they are also adaptable and forward-thinking. They have a complex relationship with other species, particularly the human-dominated Galactic Federation, often serving as allies, advisors, or military forces. Their presence in the *Mass Effect* universe highlights themes of genetic engineering, survival, and the ethical implications of creating life for specific purposes.
Tehkans appear in multiple installments of the *Mass Effect* trilogy, including *Mass Effect 2*, *Mass Effect 3*, and the spin-off games *Mass Effect: Andromeda* and *Mass Effect Legendary Edition*. Their design and lore contribute to the rich tapestry of the *Mass Effect* universe, offering players a glimpse into a future where humanity is not alone in the galaxy.