Finally got to take some pictures of the crew! It is made of 25 minifig (1 medik is missing on this picture).
The Captain of the Galaxy, Syd Niav with the Bridge Officer. The Bridge Officer is carrying a Pistol and a Portable Shield Generator (+2 armor). Syd is carrying is Bladed Assault Rifle.
The pilots. Three of them works on the bridge (communications, navigation and weaponry). The fourth one is the Pilot of the Peregrine
(the frigate usually carried by the Galaxy).
Mediks, carrying their Portable Surgical Kit (PSK). Inspired by some ancient torture devices, the PSK include a laser trimmer, a work lamp and an injection tip with multiple drugs to quickly fix any injured unit.
The three Mechaniks in charge of the Spacecraft are carrying either a Portable Computer to interface with other device or a Multitool. The Multitool include all the basics tools required for adjustments, maintenance or reparation of any mechanical device.
The squad of guards wear heavy armor. In addition to the Scope, their Assault Rifle is mounted with a bayonet for close combat.
The Troopers are the main combat units. Like the Guards, they wear heavy armor. They can mount a harpoon for increased damage or a scope on their Assault Rifle. They also carry a pipe bomb.
The Demolition squad, armed with Machine Guns and Grenade Launcher. You can guess what their specialty is. They wear light armor because of the weight already added by the heavy weapons they are carrying.
It is possible to add an additional squad of 5 Marines armed with rifles and bayonets when the hangar is not occupied by something else.