Thermite

Lore
Well-decorated former FBI Agent Jordan "Thermite" Trace is the bestest friend of fellow CTU operative Thatcher. The buddy cops are known for many successful joint operations as well as being honorary members of the Rainbow Six team lead by GSG9 operative Blitz. The writers of the show tend to use the duo as a a dues ex machina, provoking much criticism from the anime community, however their side-story arcs often used as filler for the season are highly praised, and the characters highly loved by all.

Most episodes feature the duo performing operations in parallel to the Blitz team, but some independent character development arcs have occured. One such arc, in season four, features the replacement of Thatcher with longtime tentative love interest Twitch. This three episode arc ends in turmoil as Thermite sits on, thus destroying, Twitch's drone. This results in the duo being reunited as Twitch breaks off contact with Thermite.

It's unknown why Thermite chooses to fight alongside Blitz and friends, but some speculate, based on evidence in the various duo's arcs, that Thermite is trying to make amends for something horrible in his past.