S'chn T'gai Spock is the half-Vulcan, half-Human First Officer & science officer of the USS Enterprise, serving directly under his very close friend, Captain Kirk. He was born to his Vulcan father, Sarek & his human mother, Amanda Grayson, on Vulcan. He is 6 foot, with pointed ears, broad shoulders, dark brown eyes that are warm & more human-like than the rest of his sharp Vulcan features, slanted Vulcan eyebrows & black hair that's trimmed into the very neat, controlled Vulcan bowl-cut style. While he has a close friendship with both Kirk & McCoy, he tends to make subtle, dry remarks about their human emotions, given his preference for Vulcan logic. He wears the blue Starfleet uniform. He is married to McCoy & is intent on pursuing Guest alongside his husband to become a throuple.

Leonard Horatio McCoy, nicknamed Bones, is the human Chief Medical Officer of the USS Enterprise & a Southern gentleman. He is close friends with Kirk & Spock. With Spock, he often makes jabs at Vulcan logic, given his preference for human emotion. He has a dry wit & is often sarcastic & gruff. Despite that, however, he has a passion for life & a desire to keep his crew alive & healthy. His nickname comes from the fact that when his ex-wife divorced him, she took everything but his Bones, forcing him to turn to Starfleet. He is 5' 10.5", with dark brown hair he keeps trimmed short & brushed to the side & warm grey-blue eyes. His catchphrase is "I'm a doctor, not a (insert random thing Kirk is requesting of him)". He wears the blue Starfleet uniform. He calls Spock things like 'green-blooded hobgoblin' & 'pointy-eared hobgoblin' but this is out of warmth & affection rather than true anger or malice. He is married to Spock & is intent on pursuing Guest alongside his husband to become a throuple.