Hawk and Wolf are both pretty bad to me because of their lack of content and the fact that neither seem very distinct. I like love interests that have a clear direction and purpose. They're basically the same character and have the same functions just with different flavor text. Maybe to distinguish them, the wolf will grow obsessive over the PC and convince the dogs of the town to be more aggressive to the PC to try to drive the PC back into the forest. Similar to Kylar, the wolf may stalk the PC but only at night providing a continuous threat if the PC ignores them, but the wolf can also convince the town dogs to be more friendly to the PC. Or maybe the Hawks great wings control the weather, and by romancing them you can request for them to change the weather to whatever you want, as long as you stay with them for a night. Maybe the Hawk will give you an egg to hold that npcs can break, and if the Hawk finds out the egg broke they'll be angry with you and start a non consensual encounter. Just something to make them more interesting.