Headcanon: Loki
At first, Nanna had no qualms with Loki, after all he was her brother-in-law. But after he killed Baldr, and then Hodr she found herself unable to stand even the thought of him. And then she died as well from grief. She was caught between furious at him and elated to see Baldr once more. However, as the years rolled by, and with Baldr telling her that Loki had not meant to kill him the sharp edge of her anger had dulled. So while she does not loathe, Loki, she is no where near as fond of him as she was when alive for the first time. She is however grateful that he brought them back, allowing her to get to know her son. Perhaps that, and future interactions will cool the last of her embers of her ire and she will remember that she was fond of him once.
