Teague
Tej is more prone to forming fast, fierce attachments to people. His bond with Esther being broken adversely affected him. It is because his father is around but has nothing to do with him, and because his best friend has a soul mate. Tej feels alone and slighted.
I don't mean to sound spooky, Teague. Maybe I simply am spooky, but I do care about my son. My family was what stopped me from killing, or I never would have ceased. I didn't want to until I had them. He needs something to love. I'm going to see if I can try for him.