Freyja is very grateful to hemera for saving her life and raising her with her safety in mind as amaurot was safer than where they were living. She doesnt really build up conscious resentment for Hemera, but rather her resentment is towards amaurot itself and the people who symbolize it to her like hermes and hades. I think there is something subconscious there but she can easily project it onto others since Hemera is always outside of amaurot on azem business. Freyja and Hemera are family in a way that wch and sveinn arent; wch and sveinn are like platonic soulmates and do not act like siblings, they have a strange attached relationship where its not romance but its not simply friendship either. They are weird, Freyja and Hemera are comparatively normal in relationship dynamic as large age gap siblings