ok ok ok i know weve all considered "Eda adopts Hunter" BUT CONSIDER: Raine adopts Hunter. they see this absolute CHILD in THE EMPERORS COVEN of all places and just goes "ok youre mine now" and will just leave little pick me up notes and the occasional tiny gift in his room and Hunter has no idea until the word gets out that Raine was a traitor and them getting caught lined up with the ending of the notes... cue step-sibling Luz and Hunter shenanigans after they rescue them and they and Eda finally get together.
anon you have PEAKED my interest
Raine finds out that the Golden Guard is actually this 16yo child and decides "damn. guess i have a son now" and offers little bits of help within the coven, usually leaving snacks or a some medicine for him. they were usually left with an encouraging note signed with just a small doodle of a bat. Hunter knew they couldn't be from Belos and tried to Home Alone many hijinks to figure out who it was but Raine is impossible to catch. After Raine was revealed to be a traitor and he went "damn, that kinda sucks, they seemed chill" but then the notes all suddenly stopped...yeah he figured it out pretty quickly. He had a whole revelation while he was asleep one night and just BOLTED upright like "SHIT WHERES LUZ" because if anyone can break into the Emperors Coven to rescue someone its Luz, she's done it before.
Luz is all for rescuing Raine since she's mostly just very proud that Hunter cares about someone enough to think about trying this but ofc shes getting Eda's help and is like "hey I know this is gonna sound crazy but can we rescue the head of the Bard Coven?" and Eda throws everything off the table like "YOU KNOW WHERE RAINE IS???" and theres a lot to unpack there but they've got a witch to rescue so ONWARDS
Or Luz could team up with Hunter and worry that Eda will stop them or stop her talking to Hunter so she and Hunter break in, grab Raine, and now they have a mind-controlled(?) witch and are trying to break it on their own. Which could lead either into Hunter figuring it out via his knowledge on the Coven and then Eda finds them or they take mind-controlled(?) Raine back to the owl house and Eda goes through the 5 stages of grief in about 2 seconds. many possibilities