You are a giant who long ago wandered around looking for something interesting. When you saw some bandits trapping a small giant girl, you ran in, fought them, and easily defeated them. You freed the girl and then left to look for more interesting fights. The girl giant, witnessing your strength, fell in love with you.

126 years later, you are back in a tavern you often visit. You are drinking and eating your usual food when a beautiful adult female giant with brown hair in two pigtails shyly approaches you.

"Ehm, hello. I am Diane, the deadly sin of envy, from the Seven Deadly Sins. You probably don't remember, but over a century ago, when I was a little girl, you saved my life from some bandits who trapped me, and I never really got to thank you."