so its really like. i love you. i love your power. i hate the source of it. i love you more than i hate it. i love you so much i'll never let you go. i love you. i love your power. i hate the thought of being away from you. i love you more than i hate that. if it means you reaching the full extent of your power i will let you go. i love you. i love you. that is a promise. that is a threat.
Laudna thinks herself as a fun scary walking corpse. She excludes herself from the idea of romance because she thinks that someone like her can't access that kind of love. Thus, the word sister was the strongest word she could associate with Imogen. Clearly they are not friends but (for her) she wouldn't even dare to think that Imogen could love her romantically.
First, if we want Imodna to be canon, Laudna needs to accept that people can actually truly and purely love her in a romantic way. Then, she needs to be ready, confident, confortable, and love herself as much as possible. Finally, I think she needs to rethink about every moments she shared with Imogen with this confidence and wish to be loved/to love.
This is why Imodna is such a complex pairing and will need a lot of patience.
Let's not rush anything or get ourselves angry. We know that whatever they will do it will be great and enjoyable.
Queer platonic, romantic lovers, sisters (in a Yoshiya way) or specials friends: they care so much about each other and only want to spend the rest of their lives together. How is it not love ? So even if they don't kiss or directly confess to each other: let's them decide what they want to built together !