The 32nd-century courier ship owned by Cleveland Booker, built of programmable matter so that it can change shape, cloak itself and split apart, and home to his cat Grudge.
Book's ship is introduced in That Hope Is You, Part 1, when Michael Burnham, newly arrived in 3188, collides with it and crashes on the planet Hima. It has no name on screen. Booker uses it to carry cargo and to rescue trance worms and other endangered animals.
The hull is made of programmable matter and can reshape itself in flight, and the ship carries a cloaking device and a personal transporter link. Burnham spends a year aboard it as a courier before the USS Discovery arrives, and it later docks in Discovery's shuttlebay.
In the fourth season Ruon Tarka fits it with a copy of the spore drive in But to Connect, and he and Book use it to attack the Dark Matter Anomaly. The ship is destroyed in Coming Home.