Trinity Armor

The Trinity Armor is a minor villain in the video game; Kingdom Hearts Birth by Sleep. It's a Unversed that resides in the Radiant Garden and the Mirage Arena. It's a three piece armor that consist of the α Armor, the β Armor, and the γ Armor.

γ Armor
After Terra exits Merlin's house, he spots the γ Armor fly past him. He decides to follow the armor to the Reactor.

α Armor
While that was going on, the α Armor appears in front of Ventus after Dilan and Aeleus barred him from entering Ansem the Wise's castle. Ventus decided to follow the armor piece to the Reactor.

β Armor
And while that was going on the β Armor appears near Aqua shortly after she rescues Kairi from a swarm of lesser Unversed with the help from King Mickey. Aqua also decided to follow armor piece to the Reactor. Eventually, Terra, Aqua, and Ventus found themselves in the same room. Shortly after, the three armor pieces assemble to form the Trinity Armor. The trio teamed up with each other to battle the powerful Unversed. After a long battle the three were able to defeat the Trinity Armor.