Command Squad

Any Commander, Librarian, or Chaplain may lead a Command Squad. The character and the unit are a single HQ choice. The character is a member of the unit and may not leave it. If the squad is destroyed the character may then operate independently.
Librarians and Chaplains may be attached to another character's Command Squad. Only one character of a given type may be attached to a single Command Squad. The attached character, the squad, and the character leading it are a single HQ choice. The attached character is a member of the unit and may not leave it. If the unit is destroyed the attached character and the leading character may operate independently.
A character who is leading or attached to a squad does not stop being an Independent Character for the purposes of close combat.