"As the central lintel of Structure 33, Bird Jaguar placed the lintel which closed the saga of his first five tuns in office. Here he included an image of his five-year-old son wearing typical dynastic kingly regalia--in fact, wearing a costume identical to Bird Jaguar's. They impersonate GI and GIII simultaneously in their roles as the sun and Venus, as seen by the sun-Venus-serpent element above their headdresses. They wear the drum-major headdress. The Cosmic Monster or Skyband Monster is worn as a backrack...Wielding the bird-cross scepters, they show that their ritual effectiveness is cosmic in scope. One of the few differences in their costumes is that King Bird Jaguar wears a mirror on his headdress, as the mirror of his people, while the five-year-old Chel-te, later to take office as Shield Jaguar II, does not."
Carolyn E. Tate, Yaxchilan: The Design of a Maya Ceremonial City, p. 107