Yaegashi is the computer geek of the TAC. He was originally working for the Japan's Economic Planning Agency. Even when he's a brilliant programmer, he lacks many social skills that makes him seem like a dork and coward, especially in front of Kome. This problem existed probably because he lives in a whole house of woman. At first, he had a crush on Momiji and created a computer program to predict what animal is Momiji's underwear, and later he even wanted to protect Momiji. But eventually, he turned and started noticing Kome, since Momiji already has Kusanagi.
Sakura Yamazaki
Sakura was originally born in Japan, but the loss of her mother made her move to US and is adopted by a special foundation. She was sent to Japan by the government of US to help out the fighting of the arigami, which resulted in somewhat joining the TAC. She practices the shinto religion since it's her family tradition, and this practicing made her advance through many powers that allows her to fight along side with the TAC.