Doctor Hamilton was a Human female Starfleet officer with shoulder length red hair.

In 2267, she was assigned to the USS Defiant as chief medical officer and had Captain Thomas Blair on a diet so that he could get into proper physical condition. (ST novella: The First Peer)

She was still on the Defiant in 2268, when it was lost in interphase. (TOS episode: "The Tholian Web", VAN novel: What Judgments Come)

Defiant personnel
Federation, Starfleet	USS Defiant (NCC-1764)	Tonia Barrows • Thomas Blair • Stephen Garrovick • Hamilton • Kamau Mbunga • Clarissa Nyn • Ravishankar Sabapathy • Serling • Terry Shull • Stevok • Erin Sutherland • T'Lehr • Mariah Willoughby
	USS Defiant (NX-74205) (I)	Arla Rees • Julian Bashir • Helen Blake • Bremerton • Sarita Carson • Ezri Dax • Jadzia Dax • Michael Eddington • Hector Ilario • Kelly • Kira Nerys • Kizilbash • Koletta • Meyer • Enrique Muñiz • Nog • Miles O'Brien • Odo • Reese • Paxton Reese • Krissten Richter • Benjamin Sisko • Fabian Stevens • T'Rul • Cregger Lor Mowlanish Dor Crixa Tel • Tutu • Worf, son of Mogh
	USS Defiant (NCC-75633) (II)	Julian Bashir • Boehm • Sam Bowers • John Candlewood • Jeannette Chao • Ezri Dax • Greg Forte • Darrell Gervasi • Quin Heins • Tiris Jast • Kira Nerys • Lankford • Mikaela Leishman • Aaron McCallum • Minecci • Calvin Moore • Lisa Neeley • Nog • Miles O'Brien • Odo • Tariq Rahim • Krissten Richter • Gerda Roness • Jason Senkowski • Benjamin Sisko • Nancy Sthili • Stov • Prynn Tenmei • Thirishar ch'Thane • Thron • T'rb • Elias Vaughn • Worf, son of Mogh • Amy Zucca
mirror universe	ISS Defiant (Constitution-class) Terran Empire, Starfleet	Jonathan Archer • Travis Mayweather • Phlox • Malcolm Reed • Hoshi Sato • T'Pol • Charles Tucker III
	Defiant Terran Rebellion	Leeta • Miles O'Brien • Benjamin Sisko