What did Hare want to give to Shu at the moment of her death? At the point where Hare got shot, after healing Shu, she says, "Shu... I'll give you my..." but dies before finishing her sentence. What did she want to say to Shu?
I think she wanted to say: "Shu I give you my heart". After all she did entrust Shu with her void before, and she wanted to show that her heart belonged to him, because she loved him.