Zwillamboss

Zwillamboss (ツヴィランボス) is the official codename given by Earth military to the Space Gestalt Kaiju (宇宙合体怪獣) of the swarm, two separate components functioning as one extremely massive being.

Trivia

 * The kaiju's name is derived from two German words zwilling that means to "twin" and amboss that is "anvil".