A member of T'Mir's crew who comes to love life among the people of Carbon Creek and chooses to remain on Earth.
Mestral is one of the Vulcans stranded near Carbon Creek, Pennsylvania, in 1957 in the story T'Pol tells in Carbon Creek. He goes into town with T'Mir and becomes fascinated by human society.
When a firedamp explosion traps miners, he covertly uses a phaser to blast through a rock wall and rescue a dozen of them. As a Vulcan ship arrives to take the survivors home, Mestral decides to stay behind and live among humans, a century before official first contact.