Eleven's Links
Sixx is their older brother. Eleven looks up to Sixx, and aspires to be like him. (Despite being annoyed in helping him design tattoos for rent..)
In the back of his mind he also feels moderately guilty about the past, for betraying his brothers trust and causing them both a ton of pain.
Ven is the only family that Sixx truly loves. He would do anything for his younger sibling, and enjoys teaching them how to protect themselves. Sixx worries a lot over Ven, but will never show that.