Why Does Rex Call Ahsoka Sir?

By calling her “sir” the clones are letting Ahsoka know that they accept her being in command, and respect her word as a leader. Even though her first command is a failure, the clones still respect the experience she gains, as they see the pain it causes her to lose the lives of their fellow clones.

Does Rex have feelings for Ahsoka?

Ahsoka and Rex renewed their friendship after he joined the Rebellion, and often enjoyed friendly teasing. However, Rex also expressed concern for his friend, particularly when Ahsoka left to go to Malachor. Rex was deeply saddened when he learned of Ahsoka's apparent death.

Is Ahsoka a male?

Ahsoka Tano, a Togruta female, was the Padawan learner to Anakin Skywalker and a hero of the Clone Wars. Alongside Anakin, she grew from headstrong student into a mature leader.