Shine
Hermione was jealous of Fleur, of her shine. The Veela held a light and grace that few could ever come close to, and Hermione felt her self-esteem drop with every moment spent in her presence. As the blonde's light grew brighter, Hermione's dimmed and the flame that usually burned within her shrunk to little more than a matchstick glow.
But Harry didn't notice Fleur's shine. His gaze drifted straight over her like she wasn't even there, and focused on Hermione like she was the most important thing in the world. His gaze was fuel, feeding the fire inside of her and, day by day, it grew brighter.