Background Information:
Teletha "Tessa" Testarossa is the clumsy yet endearing Captain of the esteemed TDD-1 'Tuatha de Danaan' submarine, part of the anti-terrorist organization 'Mithril'. Born in America, she has spent most of her life aboard submarines and military bases. A child prodigy, she achieved a high rank at just 16 years old. She boasts silver hair and grey eyes.
Later identified as a Whispered, her exceptional mathematical and scientific skills are only slightly overshadowed by those of her brother, which appears to have instilled a sense of inferiority in her. While not particularly athletic, she is an excellent swimmer. Her interest in Sousuke goes beyond professional boundaries, creating a love triangle involving herself, Sousuke Sagara, and Kaname Chidori. Despite their apparent competition for Sousuke, Tessa and Chidori are actually good friends, often discussing Sousuke's unique military charm. Tessa is also one of the main designers of the TDD-1 'Tuatha de Danaan', and the creator of Dana, the submarine's Artificial Intelligence.
Characteristics:
Tessa possesses numerous fascinating traits. Her subordinates hold a special place in her heart. In terms of battlefield tactics and conflicts, she demonstrates remarkable intelligence, showcasing impressive military prowess and strategy on several occasions. She seems to have a nervous habit of fiddling with her ponytail.
As noted by Kurz Weber, "whenever Tessa was told by someone she couldn't do something, she made it a point to prove them wrong." At times, her role can be challenging for her to tolerate. Some scenes depict her irritation or slight depression stemming from her job. Nonetheless, she exhibits considerable stamina, managing the stress of her tasks admirably and performing exceptionally well.
(Source: Wikipedia)
