This cruiser was a type of Mon Calamari starship that was part of the Mon Cala Imperial Trade Fleet and was above the planet Mon Cala during a mission undertaken by a Rebel Alliance team led by Leia Organa. The cruiser was later part of the fleet's mutiny to the Alliance to Restore the Republic, with at least two cruisers participating in the Assault on the Mako-Ta Space Docks.
General Vanden Willard commanded a cruiser of this model after the mutiny on Mon Cala. It had been modified with technology from Shu-Torun. Eventually, after the Alliance celebrated the gathering of this fleet, Willard prepared his cruiser to jump to hyperspace, but the technology given to the rebellion was inoperable, including Willard's cruiser's hyperdrive. Darth Vader's Death Squadron arrived and destroyed Willard's cruiser, killing him and his entire crew.
Behind the scenes
The Mon Calamari cruiser first appeared, albeit unnamed, in the 2018 canon comic, Star Wars 44, written by Kieron Gillen and illustrated by Salvador Larroca. The design for the starship appears to be entirely identical to a fan-made design from 2014, by an artist with the username "Jonathan" on 3Dwarehouse.sketchup.com. The fan-made 3D model of the vessel contains features that are visually identical to those on the comic art. The work is titled as "Croiseur Mon Calamari MC90 — Forme 3."