Kidou Senshi Gundam 00

Synopsis

The Trinity siblings meet the Ptolemaios crew, and declare themselves as allies working independently of the current Meisters. However, they reveal little information about themselves and their Gundams while Nena and Michael nearly provoke a fight with the Meisters, leaving the first meeting with strained results and high tensions between both sides. Fortunately, Sumeragi has engineer Ian Vashti secretly inspect the Gundam Thrones. At the Union MSWAD base, Professor Eifman discovers the origins of the Gundams' GN technology, but dies when the Thrones completely level the base. Captain Graham and remaining members of the OverFlags soon arrive and engages the Throne Zwei, but they pull out after one of their members, Howard Mason, is killed. The Thrones' armed intervention greatly concerns the crew of the Ptolemaios, leaving Setsuna to question whether the Trinity siblings are really Gundam Meisters.

(Source: Wikipedia)