Miranda II

The Miranda II is a joint Autobot and Earth Federation spaceship in the Unicron Trilogy continuity family.

The show basically goes downhill as soon as this thing shows up.

The Miranda II was the starship commanded by Optimus Prime and his crew during the Energon War and the Powerlinx Battles. She was designed and built by Dr. Brian Jones in secret on the Earth's Moon.

Dr. Jones named the ship Miranda after his wife Miranda Jones, thus according to naval tradition, establishing this ship as a Miranda Class.

Fiction

Energon

The Miranda II was rolled out of her secret drydock on the Moon so the Autobots could track down Unicron, using homing beacons that Ironhide had placed on two Divebomb drones. Carlos was able to trace Unicron's location, but to their surprise the beacon signals came from two different star systems.

The Autobots warp jumped to the Sol System's asteroid belt, attracting the attention of the Decepticons, who did not wish for their secret base within Unicron to be revealed. So they launched an attack as the Miranda II was preparing a Space Bridge ring module to peform a second jump, forcing them to use the starship's portable Energon Grid generator.

Somehow this moment was the emotional crux of the series.

Megatron was caught in the path of the approaching Energon Field wave, but was pushed out of the way in time by Demolishor, who nobly sacrificed himself to save his leader. He exploded, to the horror of the Autobot onlookers who had served with him.

Then Ironhide ruined the scene by saying a nonsensical line. Doofus. Go For Unicron

The Miranda II would go on to serve the Autobots and humans ably throughout the Powerlinx Battles, until her final mission against the Decepticons occupying Cybertron late in the war. Crippled by a powerful Energon Tower blast directed at them by Six Shot, Optimus Prime ordered the Autobots to abandon ship. He and Cliffjumper remained on board to try and find an area free of enemy forces so that Kicker and the Omnicons could disembark safely.

Yes, our downed starship is an inspiration to us all.

After Kicker and his team jumped, Optimus Prime ordered the Miranda II's thrusters fired to hopefully bring the ship into orbit, and out of Decepticon range. But the ship was damaged beyond repair, and rapidly plummeted toward the surface. Optimus and Cliffjumper were rescued by Omega Supreme and Superion Maximus as the Miranda II crashed into the ground.

Kicker took the fact that Miranda did not explode as a good sign, and she would be a symbol of hope to all the remaining Autobot forces fighting on Cybertron. Galvatron

From Teletraan I: The Transformers Wiki, a Wikia wiki.