sweet residues? also i cant talk to her, shes a companion. damnnnn gotta use an earlier save dont I?
Not really but the quest chain to get her back involves lots of trading items see her and choose the best route for you
https://lustdollplus.miraheze.org/wiki/Finders_keepers
Also, you should get sweet residues from defeating Pitcher plants ( Appear at the inner depth of the forest park) and then collect them with a bottle which the option should appear right after defeating them.
Edit: Apologies for the misinformation I must've forgotten she stays at the temple as I haven't played in a while and just assumed so