Disclaimer: I am not Hiromu Arakawa.
Gardening
Gardening, Dante thinks, is perfect. Plants don't talk back. They don't argue. Though they don't always obey, her power over them is complete. She can simply uproot them when they don't follow her wishes, prune them when they overstep their bounds. She can easily weed out any undesirable elements. Her influence is subtle and absolute, and the garden always follows her wishes in the end.
Not like people. People, even artificial ones, are difficult, stubborn and willful, always following their own foolish plans. They're not the same as plants, so very easy to control.
Dante has always loved to garden.