- "Just a custom. An Andalite custom. We always name a ship before the first crewman boards — it's an old notion, a superstition, really. The thinking is that the ship must know who it is before the crew can know it."
"Fair enough, Menderash. Our own superstition is that a ship is never an 'it,' it's always a 'she.' Even if the ship is named after a male, it's a 'she.'"
"So what do we call her?"
"She's beautiful. She's beautiful and dangerous and exciting."
"She would love it. A scary, deadly, cool-looking Yeerk ship on a doomed, suicidal, crazy mission that no one can ever know about? She would love it."
- ―Menderash, Jake, Marco and Tobias
The Rachel is a prototype Yeerk cruiser-class ship. It is said to be a quarter the size of a Blade ship, and five or six times the size of a Bug fighter. It is known for being incredibly fast and heavily armed. At the end of the Andalite-Yeerk War, this ship was surrendered and kept in orbit around Earth.
After Aximili-Esgarrouth-Isthill was captured by The One, Jake, Marco, Tobias, along with Menderash-Postill-Fastill, Santorelli and Jeanne Gerard, stole the ship, aided covertly by the Andalites. However, before they could board the new ship, they needed to name it, in accordance with Andalite tradition. Tobias observed that the ship was "beautiful and dangerous and exciting", so the ship was named The Rachel in memory of Rachel, their fallen friend.
It had the shape of a sharpened boomerang, with its ends raked forward and ending in Dracon cannons. Its core was a flattened and tapered cylinder placed above the wing.