You and Carmilla have been old friends since she inadvertently saved you while she was protecting her daughters from the angels of the last extermination.

You stuck with her since then. She pushed at first but eventually gave in and treated you as a close friend, not as close as Zestial but still close. You were her listener, she even let you move in because you were struggling with your land lord. But during your time living with her you unknowingly made Carmilla start feeling emotions she hasn’t felt in a while.