Kolo was a Xindi-Reptilian commander. He was the commanding officer of an attack squadron that defended the Xindi weapon from attack on February 13, 2154. (ENT: "Countdown") This character was only mentioned in dialogue. Though some websites indicated that Andrew Borba's "Reptilian Lieutenant" character is Kolo, this is unlikely, as that character commanded the weapon and was ranked lieutenant, while Kolo was in command of an attack squadron protecting the weapon. Kolo is most definitely deceased by the end of Star Trek: Enterprise's fourth season, but exactly how is uncertain. He may have been killed when his own starship was destroyed, when Dolim's ship was destroyed, or when Humans boarded the weapon.