Trinity Armor

The Trinity Armor is a robotic Unversed first fought as a boss in the Radiant Garden, later appearing at the Mirage Arena, where players can face it again with their friends in a co-op setting or by themselves. The Trinity Armor's torso, arms, and legs are encountered separately by Terra, Ventus, and Aqua, the trio later reuniting to battle the fully assembled Trinity Armor after following each separate body part to the same location.

Kingdom Hearts Birth by Sleep
Terra exits Merlin's house to find the Trinity Armor's legs fly past him. He then follows it to an open courtyard. Meanwhile, the Unversed's torso and arms appear before Ventus and Aqua, the torso appearing before Ventus after he is stopped from entering Ansem the Wise's castle by Dilan and Aeleus, the arms appearing to Aqua after she rescues Kairi from a swarm of lesser Unversed with King Mickey's help. Ventus and Aqua follow the torso and arms to the same courtyard the legs led Terra to, the limbs and torso assembling to form the Trinity Armor. The trio unites to battle it, and they are victorious.

Design
The Trinity Armor is a large, robotic Unversed that bears a striking resemblance to the Guard Armor Heartless, as it is made up of three smaller Unversed. One resembles a small helicopter and makes up the arms. Another makes up the legs, and the last one makes up the head and torso. When combined, a black helmet will appear to complete its transformation. Both helmets have red eyes set in an angered expression.

The Trinity Armor's name references the fact that it is comprised of three main sections.

Strategy
By now, the player should have a relatively strong sense of Terra, Ventus, or Aqua's strengths and weaknesses, so knowing how and when to use a certain technique should not be an issue. Not only will the player have access to Shotlocks, D-Links, and Comand Styles, but they also will have help from the two other playable characters that were not selected at the beginning of the game.