Tessa is the older of General Hammond's two young granddaughters. She and her younger sister Kayla are very close to their grandfather, and they remain #1 on his office speed dial, ahead of the President. When the NID had threatened consequences against his grandchildren, Hammond was pressured into resigning from the SGC until O'Neill restored his command by gathering evidence against Kinsey and the NID.
*Cameo - Character named for Tessa Wright: Daughter of Executive Producer Brad Wright
Cross Reference: George Hammond, Kayla
Episode Reference: Tin Man, Crystal Skull, Chain Reaction